Niv-Mizzet, Dragon King

Flying, Hexproof
Niv-Mizzet, Dragon King enters the battlefield with X +1/+1 counters.
When Niv-Mizzet, Dragon King enters the battlefield, it does X damage divided as you choose among any number of targets.
Whenever you draw a card, Niv-Mizzet, Dragon King deals 1 damage to any target.
{u/r}{u/r}{t}: Draw a card