Isn't this ability a little to overpowered

This takes place in a world where a tiny percent of the population awakened to super natural ability, with some seeing it fit for them the chosen to rule, becoming villains and some chose to side with the law becoming heroes.
Our Mc is one such, who chose to side with the law.
He always had a dream of becoming a hero as a child, but growing older he noticed humans don\'t have super power, so he thought, I just have to train hard enough until I am strong enough to be super, and so he trained from childhood to adulthood, but there were limits he could not attain, that is until the green sun came giving him ability, but it took something in return, what was taken? And how will it affect him, stick around to find out