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"Ultima Latio! Vulnerant Omnes, Ultima Necat... Bibliotheca Pan Magica!"

Shiori unleashing her true power

Bibliotheca Pan Magica (万魔図書館 (ビブリオティカ・パンマギカ) Biburiotika Panmagika; lit. "Magic Library" in Latin, "Myriad Grimoire Mansion" in Japanese) is Shiori Momono's most powerful attack, used in the final phase of Sin, Damnation and the Atonement Girl to defeat a dragon. Being one of the powerful attacks in 11eyes, performing it requires full access to her inner grimoire library. This means that she has to open the restriction on her body first, then open the library on the battlefield to prepare a kill zone. When used, a gigantic golden magic circle and all 5000 of her grimoires appear behind her. After a full incantation and charging time, the attack is released from her chest, completely obliterating everything on its path.

Uastyrdji's Analogia Bibliotheca mode was also capable of using the spell, using Benedictus of the Bookshelf's 600 grimoires. As a result, while still a considerably powerful spell, it was weaker than Shiori's version.