Niv-Mizzet, The Fallen

This spell can't be countered
Flying
Whenever you draw a card, Niv-Mizzet, the
Fallen deals 1 damage to any non-player target.
Whenever you take damage, you may draw a card.
After he fell, Liliana found his carcass. So, through
no fault of his own, he slew many that day. Warriors
and mages, soldiers and leaders.