If Joseph Hamon were a thing, then it would do extra damage to all Pillarmen compared to normal Hamon. Of course Hamon is useless against ULF(if it ever comes out).
Joseph could also have a j move, which shows the Aja stone, and nothing else, but this could be used where the volcano is if you want to do a cinematic with your friend d:
You stand in the volcano and can counter with aja when an ULF hits it, the. the laser can go into the volcano and cause it to erupt playing a cinematic sequence where the ULF get launched into space as you are also “launched to space” While saying what Joseph said in his fight against ULF Kars.
When the ULF is launched to space, eventually, they will stop thinking.
Volcano eruption can only be activated every hour, but lemme know if you guys want the cooldown longer.