Prexus, the Oceanlord

Indestructible
As long as your devotion to blue is less
than six Prexus isn't a creature.
When Prexus is cast, create three 3/3 Merfolk creature tokens called "Kedge Warrior".
Sea Creatures you control gain Haste and +1/+0
for each Island in play, divided by half.
Tidal Wave —{4}{u}, {t}: Return all creatures to their
owners' hands except for Sea Creatures.
(Crabs, Fish, Jellyfish, Krakens, Leviathans,
Merfolks, Octopus, Serpents, and Whales.)