Helper
PLST #SOI-93

Trail of Evidence

Enchantment
Trail of Evidence
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Trail of Evidence

Whenever you cast an instant or sorcery spell, investigate. (Create a Clue token. It's an artifact with ",Sacrificethis token: Draw a card.")

Card Information

Color: U
Identifies: U
Cost:
CMC: 3
Types: Enchantment
Rarity: uncommon
Languages:
Layout: normal
Rank:
#8,351
Saltiness:
0.39 / 4.0

Official Rulings

2016-04-08
Clue is an artifact type. Even though it appears on some cards with other permanent types, it's never a creature type, a land type, or anything but an artifact type.
2016-04-08
If an effect refers to a Clue, it means any Clue artifact, not just a Clue artifact token. For example, you can sacrifice Wrench to pay for Alquist Proft, Master Sleuth's activated ability.
2016-04-08
You can't sacrifice a Clue to pay multiple costs. For example, you can't sacrifice a Clue token to activate its own ability and also to activate Alquist Proft, Master Sleuth's ability.