The Four Kings

Whenever The Four Kings attack, defending
opponent mills four cards. For each creature
milled, put a -1/-1 counter on target creature.
Exile four creature cards from graveyards:
Distribute up to four -1/-1 counters on target creature. If a creature dies with four or more
counters on it, draw four cards and lose 4 life.
"In the depths of darkness, their reign knows no end."