Unshakable Tail
From Murders at Karlov Manor Commander set
Unshakable Tail
Creature — Zombie Detective
3/2
When this creature enters and at the beginning of your upkeep, surveil 1.
Whenever one or more creature cards are put into your graveyard from your library, investigate. (Create a Clue token. It's an artifact with " , Sacrifice this token: Draw a card.")
, Sacrifice a Clue: Return this card from your graveyard to your hand.