There will be no Amulet Dia. Dia will become the embryo, and will also be an X chara. It will go on a Godzilla-like rampage, being 50 ft tall and breathing fire. Amu will combine with Ran, Miki, and Su using the Humpty Lock and Dumpty Key, becoming a 50 ft tall "Amulet Joker", who has characteristics of all of her original forms. At the end of the battle, Amu will use Su's power to restore the destroyed city to normal, erase everyone's memory of the situation, then have hot rabid sex with Ikuto while Utau watches and cries.