Knowing that opponents can constantly break out of genjutsu, Isamu constructed a technique that allows the opponent to witness constant pain, locked within a hallucination of his worst nightmare. Breaking out of the genjutsu for a split second and immediately being trapped right back into the same genjutsu for the rest of his life. A scary genjutsu technique that has categorized as a forbidden technique. By synthesizing a poison toxin from enzymes from his eels, Isamu has generated the toxin to co-exist with his epidermal bacteria. That way, when coming into physical contact with someone, such as stabbing, touching,, the many various ways of applying genjutsu(five senses), such as direct contact or direct eye contact, or being bit by the eels, opponents will be injected with a poisonous gas that taints the blood with the said toxin. Accumulating in the opponent's bloodstream, it is not likely to escape the genjutsu through basic means of using Kai or using a dojutsu to break out. Opponents would have to release extensive amounts of blood, hoping the toxin to breakout of such while also hoping that the said toxin doesn't reach the arteries and the heart unless death ensues.