Gravekeeper's Oracle

Reach, Shroud, Undead, Offering, Ritual

Divine Intervention—The first time each turn,
when a player exiles a card, if this creature is in the
command zone or on the battlefield, that player
exiles their graveyard or mills a card.(They choose.)

{7}:Put target creature in exile onto its owners
battlefield. This ability costs {1} less to activate for
each creature you own in exile.