Chthonian Awakening

Whenever a creature you control dies, each
opponent loses 1 life and you gain that much life.
At the beginning of your upkeep, you may pay 20
life and sacrifice Chthonian Awakening. If you do,
create Loghorrean, the Voice of Chthon, a
legendary 20/20 black Avatar creature token with indestructible and lifelink.