Soulcatcher Chalice

Convoke
Whenever a creature dies, put a charge counter on Soulcatcher Chalice.
{1}, Sacrifice Soulcatcher Chalice: Gain control of target Saga with converted mana cost less than or equal to the number of charge counters on Soulcatcher Chalice.
Belzenlok uses it to rewrite history, even in the minds of the dead.