Name: Grimm Sleeper (グリムスリーパー).
Description: A substance that is 'intelligent' and can adjust to any object or wielder, it was created by Neikan Chi. Engineered out of cells from Mujo So's Worm Eater, it is the reverse of a shield. Instead, it is a weapon and a very deadly one to reapers.
A seemingly purple liquid when in a vile, it adapts and hardens based on the item it is applied to. This is seen as an ultimate weapon against reapers for a vampire or other being, and the only known weapon is possessed by none other than Neikan Chi.
Specific abilities: Grimm Sleeper, the given name of Neikan's blade and the newly engineered substance, has one and only one ability. It contains a poison-like substance in it's molecular structure that is released when it comes into contact with blood. This poison contains the cells of a virus that forces the victim to develop Autophagia.
Other Information: Autophagia is an Impulse-Control Disorder that involves failing to resist an impulse, drive, or temptation to perform an act that is harmful to the person or to others. The majority of individuals affected by this disorder will often feel a sense of tension or arousal before committing the act, and then experience pleasure, gratification or relief at the time of committing the act. Once the act has been completed, the individual may or may not feel regret, self-reproach, or guilt.
Autophagia occurs when one is compelled to inflict pain upon oneself by biting and/or devouring portions of one's body. It is sometimes seen with schizophrenia, psychosis and Lesch–Nyhan syndrome.