Shishi Gami, God of Life

Indestructible, defender
At the beginning of each upkeep, you may pay {x}{p/g}{p/g}{p/g}. If you do, return target creature with converted mana cost X or less from your graveyard to the battlefield.
{x}{3}: Destroy target creature with converted
mana cost X or less. You gain X life. This ability can't be prevented by abilities or
spells.