Nautilus, Titan of the Deep

Eminence — Other Crab, Fish, Kraken,
Leviathan, Octopus, Serpent, Starfish, Turtle,
and Whale spells you cast cost {1} less to cast.
Nonbasic lands are Islands.
Crabs, Fish, Krakens, Leviathans, Octopuses,
Serpents, Starfish, Turtles and Whales
you control have Islandwalk.
"These waters are MINE."