This is a floodgate-oriented Water deck, centered around A Legendary Ocean , which is always treated as "Umi", and Water monsters. This Umi Retrain not only gives a small ATK buff to Water monsters, it also lowers them by 1 Level, allowing powerful Level 5 monsters like Ocean Dragon Lord - Kairyu-Shin to be normal summoned without tributes. Kairyu-Shin is essentially a Gozen Match on legs, that is also able to search an Umi-related card, not only that, the deck also has access to Electric Jellyfish, which can negate a monster or spell card or effect, and is able to special summon a Water from hand. Overall, this deck is a concievably strong deck, but is held back by a lack of consistency and a good boss monster.