Demon-Dweller Sword: Conquering Eon

Ultimate Sword Magic: Demon-Dweller Sword: Conquering Eon (剣究極魔法『宿魔の剣 覇劫』) is a Sword Magic spell.

Description
With an open grimoire, the user holds the Demon-Dweller Sword aloft and has it absorb the magic of their allies. The user then swings the sword down and unleashes the power in a single slash.