The Realm of the Sea Emperor Structure Deck launches an ocean themed Yu-Gi-Oh! Deck for Duelists. As with all Structure Decks, Realm of the Sea Emperor is designed to give Duelists a jumping off point to build a competitive Deck. This Structure Deck will introduce 5 brand new cards including an extremely powerful Spell Card that all deep-sea Duelists will want to have in their Deck. Duelists can find additional Sea Serpents in Abyss Rising.