User blog comment:Crimson and Darkness/Volume 24 discussion blog/@comment-2601:3C4:4300:DCA0:34CB:2987:B4E7:6B-20180125022234/@comment-2601:8C:601:5692:DAE:CCE2:896A:BBAE-20180209084519

Arondight - Lancelot's holy sword that becomes a demonic sword (NOTE: this name seems to be a modern creation, though one that has been adopted by a number of Japanese LN/manga/anime/ video game series)