Helper
RAV #13

Devouring Light

Instant
Devouring Light
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Devouring Light

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.) Exile target attacking or blocking creature.

Card Information

Color: W
Identifies: W
Cost:
CMC: 3
Types: Instant
Rarity: uncommon
Languages:
Layout: normal
Rank:
#9,147
Saltiness:
0.37 / 4.0

Official Rulings

2014-07-18
The declare blockers step is the last chance to cast Devouring Light before creatures deal their combat damage. However, a creature remains an attacking or blocking creature during the combat damage step and end of combat step. Devouring Light may be cast targeting such a creature during those steps, after the creature has dealt combat damage.
2024-01-12
Because convoke isn't an alternative cost, it can be used in conjunction with alternative costs.
2024-01-12
If a creature you control has a mana ability with {T} in the cost, activating that ability while casting a spell with convoke will result in the creature being tapped before you pay the spell's costs. You won't be able to tap it again for convoke. Similarly, if you sacrifice a creature to activate a mana ability while casting a spell with convoke, that creature won't be on the battlefield when you pay the spell's costs, so you won't be able to tap it for convoke.
2024-01-12
Tapping a multicolored creature using convoke will pay for {1} or one mana of your choice of any of that creature's colors.
2024-01-12
Tapping an untapped creature that's attacking or blocking to convoke a spell won't cause that creature to stop attacking or blocking.
2024-01-12
When calculating a spell's total cost, include any alternative costs, additional costs, or anything else that increases or reduces the cost to cast the spell. Convoke applies after the total cost is calculated. Convoke doesn't change a spell's mana cost or mana value.
2024-01-12
You can tap any untapped creature you control to convoke a spell, even one you haven't controlled continuously since the beginning of your most recent turn.