Ketsumakubyō

The Ketsumakubyō (血蒔く病, Blood Dissemination Virus) is a nano-scale virus capable of near instantaneously, reducing to a dry, powder-like state. It is used through the Pathogen Incubation Asylum.

Because of this, it can quickly dispose of targets, and is especially effective against and Ketsuryūgan wielders and those with similar bloodlines, as it coagulates the blood and prevents anti-coagulants from functioning properly, denaturing it as a weapon. Often employed in assassination by Ayame Aikawa, she can dispose of a target with but a simple breath of air, skin contact or a single cut, whether it be clearly view able or unnoticed.