The Tower of Revenge

Kai always had the feeling someone from above was watching him. As he moved through the tower fighting and training to be the best there was, he met his best friends along the way who he traveled with to become the first to ever reach the peak and obtain power beyond imagination.

But when the group is faced with a choice to kill one of their own as a sacrifice for power, Kai is betrayed and killed as his friends become blinded by powers. At the face of death, the deity who's eyes have been on Kai since the beginning of his life visits him and gives him the possibility to break the rules of this world and go back in time 25 years to his first day entering the tower in exchange for aiding him in taking down the rest of the deities for the sins they have committed.