Archenemy

Archenemy is a longsword used by Kagura Mikazuchi.

Description
Said to be "The Blade of Resentment", She use it with her Style of the Undrawn Long Sword. The sword is strong enough to cut Ophiuchus into four pieces while still sheated as well as to defeat Yukino Aguria. According to a member of Mermaid Heel, once Kagura pulls out the sword, it would cause a cataclysm.