Ergoth Obliterator

Haste
When Ergoth Obliterator enters the battlefield,
you may discard any number of creature cards
from your hand. If you do, create that many 1/1
green Elf Warrior creature tokens. Ergoth Obliterator gets +X/+0 for each card you've discarded this turn.
The Prime Archdemon craves blood, and so the Ergoth provide it. Rule #1: No survivors.