Casseur de Logistille: Destruction Declaration (破却宣言キャッサー・デ・ロジェスティラ, Hakyaku SengenKyassā De Rojesutira?) is a thick magic-binding leather book specially given by and inherited from a witch, Logistilla, to Astolfo, after the former was charmed by the latter. It contains records of the means to shatter any magecraft, granting its owner the passive ability to deal with magecraft of A Rank and below. Though his Magic Resistance is normally D Rank, it is greatly elevated to A Rank, effectively making him immune to all modern magecraft.