Leviathan, Summoned Titan

Leviathan 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. Return it to
the battlefield tapped under its owner's control
at the beginning of the next end step.

Leviathan, Summoned Titan is a copy of
Nezahal, Primal Tide.