Catacomb of the Forgotten City

At the end of your turn, you may exile a card from any player’s graveyard. If you do, choose one:
•A land or battle: one 1/1 insect.
•An instant or sorcery: one 1/1 ooze.
•A creature or planeswalker: one 1/1 rat.
{bull}An artifact or enchantment: one 1/1 skeleton.

{x}: Sacrifice X creatures: Target a creature in any graveyard with X mana value. Return that creature to the battlefield with a finality counter