Oglor, Devoted Assistant

At the beginning of your upkeep, look at the top two cards of your library, then put one of them into your graveyard. Whenever a creature card is put into your graveyard from your library or hand, it perpetually gains "When this card leaves your graveyard, create a tapped 2/2 black Zombie creature token."

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6oefnma8nvpb1h3y3zeyg2.