Mysterious Heroine X Alter's weapon. It is often seen resembling a red double bladed lightsaber, but originally took a form resembling a glowing red energy sword variant of Himitsucalibur and by extension Excalibur with red markings on its hilt. It can also transform into a chainsaw.
Similarly to Himitsucalibur, if its portrayed in its original form without the glowing element, it may simply be tagged as Excalibur.
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