Haluat of The Ghost Council

Flying, lifelink, haunt (When this creature dies, exile
it haunting target creature)
When Haluat of The Ghost Council enters the battlefield, target player sacrifices a creature with
the greatest amount of power, you gain life equal
to its toughness.
Whenever a player draws a can, they may pay {b}{b} if they don't, add 2 +1 +1 counters