Name: Kodai no Kokoro (Japanese for "Mind of the Ancient")
Number: Numberless, as only the Kido Corps knows this Kido.
Category: Bakudou.
Incantation: "Carrier of plague, raise your scythe and slip the throat of life. Rip their heads of, remove their memory. Evaporate, ye mindless dog!"
Effect: This Kido was labelled forbidden by the captain commander, after he/she first witnessed it's creator; Samara Sawamatsu use it for the first time. However, this restriction was lifted when a new Captain Commander was appointed. But; only the Kido Corps and the Captain Commanders bears knowledge about this Kido.
The user have to clap their hands together, and store up reiyoku for a while (5 posts). While the user stores up reiryoku, the user can't fight. Thus, allies of the user will have to subdue the victim. After reiyoku is stored up, the user have to hold their hands up in the air. Five starlike spheres will float above the heads of the user and the victim. One by one, the spheres will smash into the victim. These spheres will remove the victims memory on impact. After one sphere, recent memories are wiped. After two, memories of locations will be removed. After the third sphere, the memories centered around oneself is removed. After the fourth, ones capabilities will be removed, e.g. speech. When the final sphere hits the victim, all their remaining memories will be removed, along with remaining capabilities. However, this Kido can be stopped whenever the user want to, but the effects will still linger. If only two spheres hits the victim and the user cancel, the effect of these two spheres will still linger. If all the 5 spheres successfully hit the victim, the user's lifespan will shorten somewhat.
The Kido Corps usually use this Kido to remove the memories of former captains. There are currently no known ways of reversing the memory-removal.