Deepmariner's card was left in the Ouroboros Realm while Hopper1 and Steamliner were sent by Fuga to find the person chosen by fate. Deepmariner was eventually unsealed from it's Ride Chemy Card and was now on the loose, it was last seen escaping into the Human World from the portal to the Ouroboros Realm. [Gotcha! Hopper1!]

At an unknown point after it's escape, Deepmariner synchronized with the malice of a man named Kariya who used it's powers to become the Submarine Malgam who used his power