Count the number of opponents you currently have, not how many you started with. If your four-player game is down to you and a single opponent, the land enters the battlefield tapped.
If an effect puts the land onto the battlefield tapped, having two or more opponents won't untap it.
If a land card with an appropriate subtype is entering the battlefield from your hand at the same time as one of these lands, you may reveal the other land to have the "Snarl" enter untapped.
If an effect instructs you to put one of these lands onto the battlefield tapped, it will still enter the battlefield tapped even if you reveal a land card from your hand.
The "Snarl" itself doesn't have any land subtypes. You can't reveal one to satisfy the ability of another.
You may reveal any land card with either or both of the appropriate subtypes. It doesn't have to be a basic land card.
Priest of Titania's ability counts all Elves on the battlefield. This includes Priest of Titania itself as well as Elves controlled by other players.
Priest of Titania's ability is a mana ability. It doesn't use the stack and players can't respond to it. Notably, this means other players can't try to remove Elves from the battlefield after you activate this ability but before it resolves.
For spells with {X} in their mana costs, use the value chosen for X to determine the spell's mana value. For cards in your library with {X} in their mana costs, X is considered to be 0.
If Rashmi's ability resolves and the spell that caused it to trigger has been countered, use that spell's mana value as it last existed on the stack to determine whether or not you may cast the top card of your library.
If the card has {X} in its mana cost, you must choose 0 as the value of X when casting it without paying its mana cost.
If the revealed card is a land card, you put it into your hand.
If you cast a card "without paying its mana cost," you can't choose to cast it for any alternative costs, such as emerge costs. You can, however, pay additional costs. If the card has any mandatory additional costs, such as that of Cathartic Reunion, those must be paid to cast the card.
If you cast the top card of your library, you do so as part of the resolution of Rashmi's ability. You can't wait to cast it later in the turn. Timing permissions based on the card's type are ignored, but other restrictions (such as "Cast [this card] only during combat") are not.
Rashmi has to be on the battlefield at the moment you cast your first spell. If that spell is Rashmi itself, Rashmi's ability can't trigger. If that spell causes Rashmi to leave the battlefield as an additional cost to cast it, Rashmi's ability can't trigger.
Rashmi's ability resolves before the spell that caused it to trigger. If you cast a spell using the ability, it will also resolve before the initial spell.
Rashmi's ability triggers when you cast your first spell each turn, not just on your turn.
Whenever you cast your first spell each turn, reveal the top card of your library. You may cast it without paying its mana cost if it's a spell with lesser mana value. If you don't cast it, put it into your hand.
If multiple effects modify your hand size, apply them in timestamp order. For example, if you put Null Profusion (an enchantment that says your maximum hand size is two) onto the battlefield and then put Reliquary Tower onto the battlefield, you'll have no maximum hand size. However, if those permanents enter in the opposite order, your maximum hand size would be two.
If the target permanent is an illegal target by the time Beast Within tries to resolve, the spell won't resolve. No player creates a Beast token. If the target is legal but not destroyed (most likely because it has indestructible), its controller does create a Beast token.
The last ability applies to nonland cards in any zone, provided something is allowing you to cast them. For example, you could cast a sorcery with flashback as though it had flash.
You can cast a nonland card with flash any time you could cast an instant.
A landfall ability doesn't trigger if a permanent already on the battlefield becomes a land.
A landfall ability triggers whenever a land you control enters for any reason. It triggers whenever you play a land, as well as whenever a spell or ability puts a land onto the battlefield under your control.
Whenever a land you control enters, each landfall ability of the permanents you control will trigger. You can put them on the stack in any order. The last ability you put on the stack will be the first one to resolve (As a result, you can have those abilities resolve in the order of your choosing.).
Because a spell with overload doesn't target when its overload cost is paid, it may affect permanents with hexproof or with protection from the appropriate color.
If you are instructed to cast a spell with overload "without paying its mana cost," you can't choose to pay its overload cost instead.
If you don't pay the overload cost of a spell with overload, that spell will have a single target. If you pay the overload cost, the spell won't have any targets.
To determine the total cost of a spell, start with the mana cost or alternative cost you're paying (such as an overload cost), add any cost increases, then apply any cost reductions. The mana value of the spell remains unchanged, no matter what the total cost to cast it was.
Return target nonland permanent you don't control to its owner's hand.
Overload (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")
Scry appears on some spells and abilities with one or more targets. If all of the spell or ability's targets are illegal when it tries to resolve, it won't resolve and none of its effects will happen. You won't scry.
When you scry, you may put all the cards you look at back on top of your library, you may put all of those cards on the bottom of your library, or you may put some of those cards on top and the rest of them on the bottom.
You choose how to order cards returned to your library after scrying no matter where you put them.
You perform the actions stated on a card in sequence. For some spells and abilities, that means you'll scry last. For others, that means you'll scry and then perform other actions.
A modal double-faced card can’t be transformed or be put onto the battlefield transformed. Ignore any instruction to transform a modal double-faced card or to put one onto the battlefield transformed.
If an effect allows you to play a land or cast a spell from among a group of cards, you may play or cast a modal double-faced card with any face that fits the criteria of that effect.
If an effect allows you to play a specific modal double-faced card, you may cast it as a spell or play it as a land, as determined by which face you choose to play. If an effect allows you to cast (rather than “play”) a specific modal double-faced card, you can’t play it as a land.
If an effect instructs a player to choose a card name, the name of either face may be chosen. If that effect or a linked ability refers to a spell with the chosen name being cast and/or a land with the chosen name being played, it considers only the chosen name, not the other face’s name.
If an effect puts a double-faced card onto the battlefield, it enters with its front face up. If that front face can’t be put onto the battlefield, it doesn’t enter the battlefield.
In the Commander variant, a double-faced card’s color identity is determined by the mana costs and mana symbols in the rules text of both faces combined. If either face has a color indicator or basic land type, those are also considered.
The mana value of a modal double-faced card is based on the characteristics of the face that’s being considered. On the stack and battlefield, consider whichever face is up. In all other zones, consider only the front face. This is different than how the mana value of a transforming double-faced card is determined.
There is a single triangle icon in the top left corner of the front face. There is a double triangle icon in the top left corner of the back face.
To determine whether it is legal to play a modal double-faced card, consider only the characteristics of the face you’re playing and ignore the other face’s characteristics.
A modal double-faced card can’t be transformed or be put onto the battlefield transformed. Ignore any instruction to transform a modal double-faced card or to put one onto the battlefield transformed.
If an effect allows you to play a land or cast a spell from among a group of cards, you may play or cast a modal double-faced card with any face that fits the criteria of that effect.
If an effect allows you to play a specific modal double-faced card, you may cast it as a spell or play it as a land, as determined by which face you choose to play. If an effect allows you to cast (rather than “play”) a specific modal double-faced card, you can’t play it as a land.
If an effect instructs a player to choose a card name, the name of either face may be chosen. If that effect or a linked ability refers to a spell with the chosen name being cast and/or a land with the chosen name being played, it considers only the chosen name, not the other face’s name.
If an effect puts a double-faced card onto the battlefield, it enters with its front face up. If that front face can’t be put onto the battlefield, it doesn’t enter the battlefield.
In the Commander variant, a double-faced card’s color identity is determined by the mana costs and mana symbols in the rules text of both faces combined. If either face has a color indicator or basic land type, those are also considered.
The mana value of a modal double-faced card is based on the characteristics of the face that’s being considered. On the stack and battlefield, consider whichever face is up. In all other zones, consider only the front face. This is different than how the mana value of a transforming double-faced card is determined.
There is a single triangle icon in the top left corner of the front face. There is a double triangle icon in the top left corner of the back face.
To determine whether it is legal to play a modal double-faced card, consider only the characteristics of the face you’re playing and ignore the other face’s characteristics.
: Add .
Channel — ,Discardthis card:Destroytarget artifact, enchantment, or nonbasic land an opponent controls. That player may search their library for a land card with a basic land type, put it onto the battlefield, thenshuffle This ability costs less to activate for each legendary creature you control.
Boseiju, Who EnduresLegendary LandNormal
Vizier of the Menagerie #649Creature — Snake Cleric
If the top card of your library changes while you're casting a spell, playing a land, or activating an ability, you can't look at the new top card until you finish doing so. This means that if you cast the top card of your library, you can't look at the next one until you're done paying for that spell.
Normally, Vizier of the Menagerie allows you to cast the top card of your library if it's a creature card, it's your main phase, and the stack is empty. If that creature card has flash, you'll be able to cast it any time you could cast an instant, even on an opponent's turn.
The top card of your library isn't in your hand, so you can't cycle it, discard it, or activate any of its activated abilities.
Vizier of the Menagerie lets you look at the top card of your library whenever you want (with one restriction—see below), even if you don't have priority. This action doesn't use the stack. Knowing what that card is becomes part of the information you have access to, just like you can look at the cards in your hand.
You may spend mana as though it were mana of any type to cast any creature spell, not just creature spells that you cast from the top of your library.
You'll still pay all costs for that spell, including additional costs. You may also pay alternative costs such as emerge or that of As Foretold.
You may look at the top card of your library any time.
You may cast creature spells from the top of your library.
You can spend mana of any type to cast creature spells.
Vizier of the MenagerieCreature — Snake ClericNormal - ~$0.72
Craterhoof Behemoth’s triggered ability affects only creatures you control at the time it resolves. Creatures you begin to control later in the turn won’t gain trample and get +X/+X.
The value of X is calculated only once, as Craterhoof Behemoth’s last ability resolves.
After an escaped spell resolves, it returns to its owner's graveyard if it's not a permanent spell. If it is a permanent spell, it enters the battlefield and will return to its owner's graveyard if it dies later. Perhaps it will escape again—good underworld security is so hard to come by these days.
Escape's permission doesn't change when you may cast the spell from your graveyard.
If a card has multiple abilities giving you permission to cast it, such as two escape abilities or an escape ability and a flashback ability, you choose which one to apply. The others have no effect.
If a card with escape is put into your graveyard during your turn, you'll be able to cast it right away if it's legal to do so, before an opponent can take any actions.
If you cast a spell with its escape permission, you can't choose to apply any other alternative costs or to cast it without paying its mana cost. If it has any additional costs, you must pay those.
Once you begin casting a spell with escape, it immediately moves to the stack. Players can't take any other actions until you're done casting the spell.
To determine the total cost of a spell, start with the mana cost or alternative cost you're paying (such as an escape cost), add any cost increases, then apply any cost reductions. The mana value of the spell remains unchanged, no matter what the total cost to cast it was and no matter whether an alternative cost was paid.
Uro's effect doesn't count as playing a land. It can put a land card onto the battlefield even if it's not your turn or if you've already played your land for the turn.
Uro's first ability causes you to sacrifice it if you didn't cast it, or if it was cast using any permission other than an escape ability.
Uro's second ability triggers when it enters the battlefield, even if it didn't escape.
When Uro enters,sacrificeit unless it escaped.
Whenever Uro enters or attacks, you gain 3 life and draw a card, then you may put a land card from your hand onto the battlefield.
Escape—, Exile five other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)
Creatures you control have vigilance and ": Add one mana of any color. Spend this mana only to cast a creature spell."
Whenever you cast a creature spell, if three or more mana from creatures was spent to cast it, draw a card.
Inga and EsikaLegendary Creature — Human GodNormal - ~$1.8
Growth Spiral's effect doesn't count as playing a land. It can put a land card onto the battlefield even if it's not your turn or if you've already played your land for the turn.
Other effects can prevent a permanent from untapping during an untap step. You do need to look carefully, however, as many effects say that the permanent does not untap during its controller's untap step, and this card's ability occurs during other players' untap steps. If a card does say this, then Seedborn Muse can untap it. But some other abilities are not written this way and can still prevent a card from untapping.
All your permanents untap during each other player's untap step. You have no choice about what untaps.
: Add .
Channel — ,Discardthis card: Return target artifact, creature, enchantment, or planeswalker to its owner's hand. This ability costs less to activate for each legendary creature you control.
Abilities that create replacement effects, such as a permanent entering the battlefield tapped or with counters on it, can't be targeted. Abilities that apply "as [this creature] enters the battlefield" are also replacement effects and can't be targeted.
Activated abilities are written in the form "[Cost]: [Effect]." Some keyword abilities, such as equip, are activated abilities and will have colons in their reminder texts. Loyalty abilities of planeswalkers are activated abilities.
An activated mana ability is one that adds mana as it resolves, doesn't have a target, and isn't a loyalty ability. A triggered mana ability is one that adds mana and triggers on an activated mana ability.
If you counter a delayed triggered ability that triggered at the beginning of the "next" occurrence of a specified step or phase, that ability won't trigger again the following time that phase or step occurs.
Triggered abilities use the word "when," "whenever," or "at." They're often written as "[Trigger condition], [effect]." Some keyword abilities, such as afterlife, are triggered abilities and will have "when," "whenever," or "at" in their reminder text.
All your green and/or blue creatures untap during each other player's untap step. You have no choice about what untaps. Those creatures untap at the same time as the active player's permanents.
During each other player's untap step, effects that would otherwise cause your green and/or blue creatures to stay tapped don't apply because they only apply during *your* untap step. For example, if you control Nettle Sentinel (a green creature that says "Nettle Sentinel doesn't untap during your untap step"), you untap it during each other player's untap step.
Multiple Murkfiend Lieges are redundant when it comes to the untap effect. You can't untap your permanents more than once in a single untap step.
The abilities are separate and cumulative. If another creature you control is both of the listed colors, it will get a total of +2/+2.
Other green creatures you control get +1/+1.
Other blue creatures you control get +1/+1.
Untap all green and/or blue creatures you control during each other player's untap step.
Bane of Progress's ability destroys all artifacts and enchantments, including those you control.
If an artifact or enchantment isn't destroyed (perhaps because it has indestructible or it regenerated), it won't count toward the number of +1/+1 counters put on Bane of Progress. However, if an artifact or enchantment is destroyed but doesn't go to its owner's graveyard due to a replacement effect (like the one Rest in Peace creates), it will count.
Kinnan doesn’t care about any restrictions or riders the nonland permanent put on the mana it produced. The additional mana Kinnan produces won’t have any restrictions or riders.
The additional mana is produced by Kinnan, not by the nonland permanent that you tapped for mana.
The types of mana are white, blue, black, red, green, and colorless.
You’re “tapping a permanent for mana” only if you’re activating a mana ability of that permanent that includes the {T} symbol in its cost. A mana ability produces mana as part of its effect.
Whenever you tap a nonland permanent for mana, add one mana of any type that permanent produced.
: Look at the top five cards of your library. You may put a non-Human creature card from among them onto the battlefield. Put the rest on the bottom of your library in a random order.
Kinnan, Bonder ProdigyLegendary Creature — Human DruidNormal
Land cards not on the battlefield aren't Forests while Yavimaya is on the battlefield.
Yavimaya's ability causes each land on the battlefield to have the land type Forest. Any land that's a Forest has the ability "{T}: Add {G}." Nothing else changes about those lands, including their names, other subtypes, and whether they're legendary, basic, or snow.
Yavimaya, Cradle of Growth isn't a Forest while it's not on the battlefield.
Because you never "cast" a land card, Eladamri, Korvecdal doesn't allow you to play a land creature (such as Dryad Arbor) from the top of your library.
If the top card of your library changes while you're casting a spell, playing a land, or activating an ability, you can't look at the new top card until you finish doing so. This means that if you cast a spell from the top of your library, you can't look at the next one until you're done paying for that spell.
You can look at the top card of your library whenever you want (with one restriction; see below), even if you don't have priority. This action doesn't use the stack. Knowing what that card is becomes part of the information you have access to, just like you can look at the cards in your hand.
You must pay all costs and follow all timing rules for spells cast from the top of your library this way.
You may look at the top card of your library any time.
You may cast creature spells from the top of your library.
, , Tap two untapped creatures you control: Reveal a card from your hand or the top card of your library. If you reveal a creature card this way, put it onto the battlefield. Activate only during your turn.
A planeswalker with indestructible still loses loyalty counters as it's dealt damage and will still be put into its owner's graveyard if its loyalty reaches 0.
The set of permanents affected by Heroic Intervention is determined as the spell resolves. Permanents you begin to control later in the turn won't gain hexproof and indestructible.
A battle with indestructible still loses defense counters as it's dealt damage. If it's a Siege, it will still be exiled when the last defense counter is removed from it, and its controller may still cast it transformed without paying its mana cost.
Hydroid Krasis's first ability triggers as you cast it, and that ability resolves before the spell itself. It resolves even if Hydroid Krasis is countered.
When you cast this spell, you gain half X life and draw half X cards. Round down each time.
Flying, trample
This creature enters with X +1/+1 counters on it.
If a creature enters the battlefield under your control and gains haste, but then loses it before attacking, it won't be able to attack that turn. This means that you can't use one Swiftfoot Boots to allow two new creatures to attack in the same turn.
Equipped creature has hexproof and haste. (It can't be the target of spells or abilities your opponents control. It can attack and no matter when it came under your control.)
Equip (: Attach to target creature you control. Equip only as a sorcery.)
If the creature is an illegal target when Rapid Hybridization tries to resolve, it won't resolve and none of its effects will happen. No Frog Lizard token will be created.
If Rapid Hybridization resolves and the creature isn't destroyed (perhaps because it has indestructible), its controller will still get the Frog Lizard token.
When this creature enters, you may search your library for an instant or sorcery card with mana value 2 or less, reveal it, put it into your hand, thenshuffle
SpellseekerCreature — Human WizardNormal - ~$22.63
If X is 10 or more, the creature card you just put onto the battlefield will get +X/+X and haste.
If a creature card in your library or graveyard has {X} in its mana cost, X is considered to be 0.
If you don't find a creature card with mana value X or less, creatures you control still get +X/+X and gain haste if X is 10 or more.
No player may take action between the time you reveal which creature card you'll put onto the battlefield and the time it gets +X/+X and haste if X is 10 or more. Any abilities that trigger as it enters the battlefield will be put onto the stack after your creatures get +X/+X and haste.
Search your library and/or graveyard for a creature card with mana value X or less and put it onto the battlefield. If you search your library this way,shuffle If X is 10 or more, creatures you control get +X/+X and gain haste until end of turn.
The “shuffle and put the card on top” is a single action. If an effect causes the top card of the library to be face up, the second card down is not revealed.
Each other creature you control enters with a number of additional +1/+1 counters on it equal to this creature's power and as a Mutant in addition to its other types.
If Dryad Arbor is changed into another basic land type (such as by Sea's Claim), it continues to be a creature and a Dryad.
Although originally printed with a characteristic-defining ability that defined its color, this card now has a color indicator. This color indicator can't be affected by text-changing effects (such as the one created by Crystal Spray), although color-changing effects can still overwrite it.
Dryad Arbor is played as a land. It doesn't use the stack, it's not a spell, it can't be responded to, it has no mana cost, and it counts as your land play for the turn.
Due to its color indicator (appearing to the left of its type line), Dryad Arbor is green. Color indicators apply in all zones, not just the battlefield.
Forest is a land type and Dryad is a creature type.
If Dryad Arbor is changed into another basic land type, it continues to be a green Dryad creature.
If a Dryad Arbor gains flash, or you have the ability to play Dryad Arbor as though it had flash (due to Teferi, Mage of Zhalfir or Scout's Warning, for example), you can ignore the normal timing rules for when during your turn you can play a land, but not any other restrictions. You can't play Dryad Arbor during another player's turn, and you can't play Dryad Arbor if you don't have any land plays remaining.
Returning the Elf you control to its owner's hand is the cost to activate the ability. Once you activate the ability, no one can try to do anything to the Elf to stop you from activating the ability.
You can target any creature with Wirewood Symbiote's ability, not just a tapped creature.
No player may take another action while you're resolving the activated ability.
An effect that checks whether you control your commander is satisfied if you control one or both of your two commanders.
Both commanders start in the command zone, and the remaining 98 cards (or 58 cards in a Commander Draft game) of your deck are shuffled to become your library.
If something refers to your commander while you have two commanders, it refers to one of them of your choice. If you are instructed to perform an action on your commander (e.g. put it from the command zone into your hand due to Command Beacon), you choose one of your commanders at the time the effect happens.
If your Commander deck has two commanders, you can only include cards whose own color identities are also found in your commanders' combined color identities. If Falthis and Kediss are your commanders, your deck may contain cards with black and/or red in their color identity, but not cards with green, white, or blue.
Once the game begins, your two commanders are tracked separately. If you cast one, you won't have to pay an additional {2} the first time you cast the other. A player loses the game after having been dealt 21 damage from any one of them, not from both of them combined.
The nonland card you reveal will be the card you draw.
To have two commanders, both must have the partner ability as the game begins. Losing the ability during the game doesn't cause either to cease to be your commander.
You can choose two commanders with partner that are the same color or colors. In Commander Draft, you can even choose two of the same commander with partner if you drafted them. If you do this, make sure you keep the number of times you've cast each from the command zone clear for "commander tax" purposes.
: Scry 1, then reveal the top card of your library. If it's a land card, put it onto the battlefield tapped. Otherwise, draw a card.
Partner (You can have two commanders if both have partner.)
If the ability does trigger, but you don’t control four or more creatures named Biovisionary when the ability tries to resolve, the ability will do nothing.
If you don’t control four or more creatures named Biovisionary at the beginning of the end step, the ability won’t trigger.
Token creatures that are a copy of Biovisionary will count.
The token is named Clue Token and has the artifact subtype Clue. Clue isn't a creature type.
The tokens are normal artifacts. For example, one can be sacrificed to activate the ability of Breya's Apprentice and one can be the target of Break Ties.
You can't sacrifice a Clue to activate its own ability and also to activate the ability of Lonis, Cryptozoologist.
Whenever another nontoken creature you control enters, investigate.
,SacrificeX Clues: Target opponent reveals the top X cards of their library. You may put a nonland permanent card with mana value X or less from among them onto the battlefield under your control. That player puts the rest on the bottom of their library in a random order.
Rhystic Study's triggered ability resolves before the spell that caused it to trigger. It resolves even if that spell is countered. The player gets the option to pay when this triggered ability resolves.
You don't have to decide whether or not to draw a card until after the player decides whether or not to pay.
To determine the total cost of a spell, start with the mana cost or alternative cost you’re paying (such as the alternative cost of Force of Will), add any cost increases, then apply any cost reductions. Force of Will’s mana value is always 5, no matter what you paid to cast it.
If this spell doesn't resolve, none of its effects occur. In particular, it will go to the graveyard rather than to its owner's library.
If Green Sun's Zenith is countered, none of its effects will happen. Notably, it will be put into its owner's graveyard rather than shuffled into its owner's library.
If you own Green Sun's Zenith, but an opponent casts it (due to Knowledge Pool's effect, for example), that opponent searches their library for an appropriate creature card, then shuffles that library. That opponent then shuffles Green Sun's Zenith into your library. You won't shuffle any library in this case.
In most cases, if you own Green Sun's Zenith and cast it, you'll shuffle your library twice. In practice, shuffling once is sufficient, but effects that care about you shuffling your library (like Psychogenic Probe, for example) will see that you've shuffled twice.
Search your library for a green creature card with mana value X or less, put it onto the battlefield, thenshuffleShuffleGreen Sun's Zenith into its owner's library.
If the legendary spell you cast this way is copied, the copy can be countered.
The legendary spell can't be countered if the mana produced by Delighted Halfling is spent to pay any portion of the spell's cost, even an additional cost or an alternative cost. This is true even if you pay an additional cost while casting a spell "without paying its mana cost."
You draw three cards and put two cards back all while Brainstorm is resolving. Nothing can happen between the two, and no player may choose to take actions.
Exotic Orchard checks the effects of all mana-producing abilities of lands your opponents control, but it doesn't check their costs. For example, Vivid Crag has the ability "{T}, Remove a charge counter from Vivid Crag: Add one mana of any color." If an opponent controls Vivid Crag and you control Exotic Orchard, you can tap Exotic Orchard for any color of mana. It doesn't matter whether Vivid Crag has a charge counter on it, and it doesn't matter whether it's untapped.
Exotic Orchard doesn't care about any restrictions or riders your opponents' lands (such as Ancient Ziggurat or Hall of the Bandit Lord) put on the mana they produce. It just cares about colors of mana.
Lands that produce mana based only on what other lands "could produce" won't help each other unless some other land allows one of them to actually produce some type of mana. For example, if you control an Exotic Orchard and your opponent controls an Exotic Orchard and a Reflecting Pool, none of those lands would produce mana if their mana abilities were activated. On the other hand, if you control a Forest and an Exotic Orchard, and your opponent controls an Exotic Orchard and a Reflecting Pool, then each of those lands can be tapped to produce {G}. Your opponent's Exotic Orchard can produce {G} because you control a Forest. Your Exotic Orchard and your opponent's Reflecting Pool can each produce {G} because your opponent's Exotic Orchard can produce {G}.
The colors of mana are white, blue, black, red, and green. Exotic Orchard can't be tapped for colorless mana, even if a land an opponent controls could produce colorless mana.
When determining what colors of mana your opponents' lands could produce, Exotic Orchard takes into account any applicable replacement effects that would apply to those lands' mana abilities (such as Contamination's effect, for example). If there are more than one, consider them in any possible order.
When this creature enters, reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, put that card into your hand.
If an effect puts this land onto the battlefield tapped, you may pay 2 life, but it still enters tapped.
Unlike most dual lands, this land has two basic land types. It's not basic, so cards such as District Guide can't find it, but it does have the appropriate land types for effects such as that of Drowned Catacomb (from the Ixalan set).
If a resolving spell puts Eternal Witness onto the battlefield, Eternal Witness's ability can target that card if it's put into your graveyard as it resolves.