Nasoj, Necroweaver

-2: Put one +1/+1 counter on up to two target creatures.
-X: Sacrifice target creature you control with Power or Toughness X. Nasoj, Necroweaver deals X damage to each opponent.
-7: Create three 1/1 black Murderer creature tokens with "Whenever this creature deals combat damage to a player, that player loses the game."