The Anti Tri-ni-set Radiation is a radiation that Byakuran, in the future, released into the atmosphere in parallel worlds. This radiation affects the Arcobaleno severely, paralyzing their movements and killing them slowly. However, it does not have an effect on normal people. It was first discovered by Verde, who used this radiation in a diluted form to trap his fellow Arcobaleno. At that point in time, he had yet to give it a name. Shoichi Irie also used it to prevent Reborn from avoiding the Ten Year Bazooka by paralyzing him, according to the plan sent to him by his future self.