Wavesifter

Creature — Elemental • Mana cost: {3}{G}{U} • Murders at Karlov Manor Commander • Common

Flying
When this creature enters, investigate twice. (To investigate, create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.")
Evoke {G}{U} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters.)

Illustrated by Nils Hamm.