Tia and Megumi reveal that Dr. Riddles called them to help Kiyo and Zatch. They then reveal their new spell "Giga La Seoshi" which traps an opponent in the barrier and causes any attack inside to be reflected. Tia and Megumi manage to burn one of the thousand-year Mamodo's books. They reveal their second new spell, "Saifogeo" which heals Kiyo, allowing him to use spells. Using "Bao Zakeruga" Kiyo manages to burn a thousand-year Mamodo's book. Penny and the surviving thousand-year Mamodo decide to retreat. The defeated book owners regain their consciousness, but they have no memory of the time when they were controlled. A man gives Kiyo a small tile that will lead to Milordo-Z. Kiyo realizes that if they can find out where the tile came from, they can find Milordo-Z's location. Elsewhere, Byonko and four thousand-year Mamodos prepare to battle Brago and Sherry Belmont.
Tia e Megumi rivelano che il Dr. Rebus le chiamate per aiutare Zatch e Kiyo. Tia utilizza così il suo nuovo incantesimo, "Giga La Seoshi" grazie a cui riesce a bruciare uno dei libri, dopodiché usa un altro nuovo incantesimo, "Saifogeo" che cura completamente Zatch.
Tia y Megumi revelan que el Dr. Adivinanzas los llamó para ayudar a Kiyo y Zatch. A continuación, revelan su nuevo hechizo "Giga La Seoshi" que atrapa a un oponente en la barrera y hace que cualquier ataque a reflejarse en el interior. Tia y Megumi logran quemar uno de los libros de los mil años de Mamodo.
パティ率いる千年前の魔物たちと、絶望的な戦いを続ける清麿とガッシュ。二人のピンチを救ったのは、ナゾナゾ博士から連絡を受けて駆けつけたティオと恵だった。敵の強力な攻撃呪文に対し、恵はティオの新呪文「ギガ・ ラ・セウシル」で対抗。包み込んだバリア内で自滅させる呪文で、敵に大ダメージを与える！
