Soul Stone

Indestructible. At the beginning of your upkeep,
put a charge counter on Soul Stone.
{t}: Exile a creature card from your graveyard.
Create a 1/1 colorless Spirit creature token.
{t}, Remove one charge counter from Soul Stone:
Exile X creature cards from any graveyard. Each
player gains X life.
{t}, Remove three charge counters from Soul
Stone: Put target creature from a graveyard onto
the battlefield under your control.