Zelretch (Weapon)

A powerful artifact reconstructed by Emiya Shirou under the instruction of Tohsaka Rin, the Jeweled Sword of Zelretch (or just Zelretch, though that short form invites confusion with its creator, Kishua Zelretch Schweinorg) only makes an appearance in the third scenario of Fate/stay night, Heaven's Feel. This jeweled blade applies a limited form of Kaleidoscope magic, allowing small tears to an infinite number of parallel worlds. Mana is siphoned from these planar possibilities, then channeled into the sword's crystal blade; when released, the immense energy takes the form of a blinding stream of light. As a jewel, the sword may also be detonated as a single-use explosive.