Irakesh, All-Consuming

Hexproof from white, menace, wither
Whenever another creature with a -1/-1
counter on it dies, its controller mills cards
equal to the number of -1/-1 counters that
were on it.
Whenever a creature card is put into another
player's graveyard from their library or hand,
create a 3/3 black nightmare ooze creature token
with wither.