Kenjaku

Whenever Lazav, Wearer of Faces attacks, exile target card from a graveyard, then investigate. (Create a Clue token. It's an artifact with
"{2} Sacrifice this artifact: Draw a card.")

Whenever you sacrifice a Clue, you may have Lazav become a copy of a creature card exiled with it until end of turn.

“It just sounds fun.”- Kenjaku