Each deck features its own special Planeswalker Commander (both oversized and regular-sized), plus 15 never-before-printed cards.
Description:

1 Azure Mage
1 Fathom Seer
1 Fog Bank
1 Willbender
1 Dulcet Sirens
1 Riptide Survivor
1 Sea Gate Oracle
1 Shaper Parasite
1 Reef Worm
1 Mulldrifter
1 Ixidron
1 Stitcher Geralf
1 Stormsurge Kraken
1 Steel Hellkite
1 Brine Elemental
1 Frost Titan
1 Sphinx of Jwar Isle
1 Sphinx of Magosi
1 Phyrexian Ingester
1 Sphinx of Uthuun
1 Hoverguard Sweepers
1 Lorthos, the Tidemaker
1 Artisan of Kozilek
1 Breaching Leviathan
1 Deep-Sea Kraken
1 Everflowing Chalice
1 Tormod's Crypt
1 Sol Ring
1 Mind Stone
1 Sapphire Medallion
1 Sky Diamond
1 Swiftfoot Boots
1 Commander's Sphere
1 Crown of Doom
1 Unstable Obelisk
1 Worn Powerstone
1 Assault Suit
1 Nevinyrral's Disk
1 Thran Dynamo
1 Ur-Golem's Eye
1 Dreamstone Hedron
1 Fool's Demise
1 Infinite Reflection
1 Well of Ideas
1 Pongify
1 Cyclonic Rift
1 Into the Roil
1 Turn to Frog
1 Exclude
1 Cackling Counterpart
1 Domineering Will
1 Dismiss
1 Intellectual Offering
1 Stroke of Genius
1 Call to Mind
1 Compulsive Research
1 Concentrate
1 Rite of Replication
1 Rush of Knowledge
1 ther Gale
1 Distorting Wake
1 Coral Atoll
1 Ghost Quarter
1 Lonely Sandbar
1 Myriad Landscape
1 Remote Isle
1 Tectonic Edge
1 Zoetic Cavern
31 Island