Gehenna Game

Legion Magic: Gehenna Game (魔法『』) is a Legion Magic spell.

Description
With an open grimoire, the user creates a circular chessboard and pieces. Subsequently, the user can summon the pieces off of the board and transform them into larger versions with which to attack enemies. As soldiers are destroyed, new ones can be created and sent out.

Trivia

 * Gehenna is a cursed valley whose name became synonymous with hell in Christian translations.