Nezahal, Primal Tide (CMRD)

Nezahal, Primal Tide  (7) 
Legendary Creature — Elder Dinosaur (7/7) 
This spell can't be countered.
You have no maximum hand size.
Whenever an opponent casts a noncreature spell, draw a card.
Discard three cards: Exile Nezahal, Primal Tide. Return it to the battlefield tapped under its owner's control at the beginning of the next end step.