My Powers Are Unusual

On the day of awakening his power, Ash awakened the waste power: copy, rating: C. C-level ability copying is recognized as a useless ability in the ability sequence. You can only temporarily borrow the power of others, and there are various restrictions. But Ash broke the iron rule: the abilities he copied would remain forever. From then on, tactics, restraint, teamwork... The rules of superpowers completely collapsed in front of him. While the enemy was still showing off his powers, Ash had quietly gathered all his powers. This is not copying, this is conquest. He alone is the legion.