Organs = Ore? Arifureta Vol 1

The sound grenade was a new addition he had picked up from a monster on the 80th floor that used ultrasonic waves to fight. He had harvested the organ the monster used to produce those sounds and incorporated it into his arsenal. It hadn’t provided him with any new magic, but the organ had been apparently classified as an ore, so he was able to transmute it into a sound grenade.