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Card Name

Press for Answers

Mana Cost

1

Type

Sorcery

Rarity

Common

rules Text

Tap target creature. It doesn't untap during its controller's next untap step.Investigate. (Create a Clue token. It's an artifact with "
2
, Sacrifice this artifact: Draw a card.")

Legal Formats

Commander, Legacy, Modern, Pauper, Pioneer, Vintage

Not Legal Formats

Alchemy, Brawl, Explorer, Historic, Standard

Rulings

(4/8/2016)
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.
(4/8/2016)
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.
(4/8/2016)
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.
(4/8/2016)
You can't cast a spell without choosing legal targets. If all of those targets become illegal, the spell doesn't resolve and you won't investigate.