Arga, Wisdom of the Deep

This spell can't be countered.
Vigilance, hexproof, protection from blue
You have no maximum hand size.
Leviathans, Krakens, Serpents, Octopuses, and
Sharks you cast cost two less to cast and draw you
a card.
Discard a Leviathan, Kraken, Serpent, Octopus,
or a Shark: Flicker Arga, Wisdom of the Deep.
Other Leviathans, Krakens, Serpents, Octopuses,
and Sharks gain +2/+2 and vigilance.