Humble the Brute

four generic mana one white mana Instant

Destroy target creature with power 4 or greater.

Investigate.(Create a Clue token. It's an artifact with " two generic mana , Sacrifice this token: Draw a card.")

"The element of surprise only works when it's backed up by a bolt between the eyes."

Showing Shadows over Innistrad#23

Price

0.06 $

Foil 0.13 $

12 printings

Daily estimate from Scryfall, not a shop quote.

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.
2016-04-08
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.