Totteoki

Totteoki (とっておき,Totteoki), renowned as the Key of End, is forged upon releasing the fifth and final pillar, known as the Pillar of End. A single slash is said to be powerful enough to completely disintegrate the given victim, whether it be a solid, liquid, or gas. It may only be wielded in during the tenure of the fifth pillar, this is known as the Final Form of the user, blessing them with power so great, they are able to subdue to disintegration process.