Leviathan and Gilgamesh are new additional espers in Final Fantasy VI Advance. Notice that both of these new espers use their sprite from Final Fantasy V. In Final Fantasy VI summoned monsters are contained in magicite, which has another purpose besides doing flashy special attacks. When Terra (Tina), Setzer or any of the characters hold a stone they learn magic spells from it. It is unknown if these new espers will bestow new spells or if they are just around for show. Also new in Final Fantasy VI Advance is a new dungeon. Not really surprising since every Final Fantasy Advance game added a bonus area. This new dungeon is called the Dragon’s den and to beat it you need to control three parties in tandem similar to the Phoenix Cave.