Umi is so back (Oct 26 balist updated)

• Brionac, Dragon of the Ice Barrier is Forbidden
• 3 copies of Atlantean Dragoons, which is Limited (at most 1)
• at least 36 cards first released after HAT's card pool closed (2014-08-13): Abysstrite, the Atlantean Spirit, Advent of Atlantis, Ash Blossom & Joyous Spring, Atlantis, City of the Sea Dragon, Azure Ocean Dragon Lord - Neo-Daedalus Rage, Call of Atlantis, Coralianectes, the Luminous Cradle Dragon, Daedalus Maelstrom, Deep Sea Repetiteur, Doom Kraken, Electric Jellyfish, First Penguin, Fish Sonar, Full Armored Crystalzero Lancer, Infinite Impermanence, Kairyu-Shin's Dark Reef, Levia-Dragon of Atlantis - Daedalus, Levia-Dragoon - Daedalus, LeVirtue Dragon, Marincess Coral Anemone, Monster Arms of Atlantis, Mulcharmy Fuwalos, Mulcharmy Purulia, Neptabyss, the Atlantean Prince, Ocean Dragon Lord - Kairyu-Shin, Poseidra Abyss, the Atlantean Dragon Lord, Poseidra, the Storming Atlantean, Pot of Prosperity, Rage of Kairyu-Shin, Royal Penguins Garden, S:P Little Knight, Sea Stealth II, Siren Vortex of Atlantis, Triple Tactics Thrust, Warchief of Atlantis, Worldsea Dragon Zealantis
• the deck costs 387 points, and Genesys allows 100

Checked against the HAT format Forbidden & Limited list (April 2014) as of 1 April 2014 and its card pool (no card first released after 13 August 2014), with the sizes and copy limits of a TCG deck.

387 of 100 points, against the Genesys points list as of 15 October 2026, with the sizes and copy limits of a TCG deck.

Not checked: the TCG card pool (a card released only in the OCG).