Memory Annihilation

Created by Ryūgen Shinshō based on in the hope of inventing a technique that can change an evil person to kind-hearted person.

Overview
Unlike its inferior parent, this technique destroys all episodic memories of all those who are in the range of the seal, excluding the caster, with the command "annihilate" (全滅, zenmetsu).

Since semantic memories are left untouched, the target will retain most intellectual, linguistic, and social skill. However, it is possible that the target may recover what was erased as a vague dream.

Trivia

 * The technique did not work as intended, as a result he labelled it as and never taught it to anyone else, fearing that it may be misused.