Prohibited Art No. 1587: Nameless Kaltz (禁書一五八七号『無名祭祀書 (ネームレス・カルツ)』 Kinsho Ichi Go Hachi Nana Gou: Neemuresu Karutsu; lit. "Prohibition Art No. 1587: Nameless Ritual Book" in Japanese) is a very powerful forbidden spell used by Shiori Momono in Hollow Mirror Field arc. It uses dark Larva energy to form a gigantic lance, which Shiori will use to 'condemn' her enemy. Shiori calls it the Nail of Conviction (断罪の爪 Danzai no Tsume).

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