Knigmog, Destroyer of Light

Menace, lifelink, deathtouch
{3}{b}{b}: Monstrosity 1. (If this creature isn't
monstrous, put one +1/+1 counters on it and it
becomes monstrous.)
When Knigmog, Destroyer of Light becomes monstrous, it gains poisonous 5. (Whenever this creature deals combat damage to a player, that player
gets five poison counters. A player with ten or more
poison counters loses the game.)