When a Ketsuryugan wielder makes direct skin contact with a target, they can infuse the some of their chakra into the target. The said chakra becomes poisonous to the target, making their bodie’s unstable. Should the target then begin to bleed, the chakra will be set off, causing the victims body to become consumed in a pitch black substance before inflating in a grotesque manner and finally the exploding in very destructive manner. Only by rendering the target unconscious (via genjutsu) will nullify the explosion. With the proper medical aid, the poisonous chakra can be extracted and saving the victim completely.