Spirit Lantern

At the beginning of your upkeep, put a -1/-1
counter on target creature. If that creature is a
Spirit, its owner sacrifices it.
If a creature would die, exile it instead, then put
a spirit counter on Spirit Lantern.
{t}, Remove X spirit counters from Spirit Lantern: Return target creature card with converted mana
cost X from a graveyard to the battlefield tapped
under your control.