Ruga, Silumgar's Emissary

0: Sacrifice a creature and put X loyalty counters on Ruga, Silumgar's Emissary, where X is that creature's power.
-X: Return target creature with converted mana cost X or less from your graveyard to your hand.
-18: For each creature in all graveyards, put a token onto the battlefield that's a copy of it.