Daring Sleuth

Creature — Human Rogue2/1
When you sacrifice a Clue, transform this creature.
Bearer of Overwhelming Truths
Creature — Human Wizard3/2
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.")