Labyrinth Guardian

Embalm is an activated ability that functions while the card with embalm is in a graveyard. “Embalm [cost]” means “[Cost], Exile this card from your graveyard: Create a token that’s a copy of this card, except it’s white, it has no mana cost, and it’s a Zombie in addition to its other types. Activate only as a sorcery.”

A token is “embalmed” if it’s created by a resolving embalm ability.