Karoda Malgold

Extort, Haunt, Wither, Afterlife 1
As long as you control a legendary artifact Karoda
Malgold has indestructible.
Whenever Karoda Malgold is put into exile or
haunts a creature you may pay {w/b}{w/b} and 4 life:
create a 1/1 white and black spirit creature token
with flying, put a -1/-1 counter on target creature
and target player loses 1 life.