

Daring Sleuth
Creature — Human Rogue
When you sacrifice a Clue, transform this creature.
Bearer of Overwhelming Truths
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Whenever this creature deals combat damage to a player, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this token: Draw a card.")
Seb McKinnon
Rulings
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.
(wotc • 2016-04-08)
If Daring Sleuth's ability triggers multiple times before any of those abilities resolves, only the first one to resolve will cause it to transform.
(wotc • 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.
(wotc • 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.
(wotc • 2016-04-08)
Rulings
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.
(wotc • 2016-04-08)
If Daring Sleuth's ability triggers multiple times before any of those abilities resolves, only the first one to resolve will cause it to transform.
(wotc • 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.
(wotc • 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.
(wotc • 2016-04-08)