|Magic system||Ancient Belka|
|Japanese name||グリモワール |
In the movie continuity, Grimoire appears primarily in Detonation.
Hayate uses Grimoire (in place of the Tome of the Night Sky) after the Bureau mages encounter Iris and Yuri at Allston Sea theme park. Similar to Hayate's Rod unit, Grimoire also visually bears a cross mark on its cover.
Dearche later also received the tome from Hayate after knowing Iris and Yuri attacking in Tokyo.
Grimoire can simplify the processes of complicated spells which require magic system preparation or aria, enabling such spells to be cast at high speed. Its pages, when filled with mana, can also be used as weapons or armors.