Percy Jackson, Son of Chaos
Percy thought that after the Giant war there would be peace. However, that would not be case. His new half-brother would soon arrive at camp and disrupt peace. If that wasn't enough, his father disowns him. Then half the council votes him for him to die.
Percy is offered another chance, going back in time as Lady Chaos' demigod son, as Judge, Jury and Executioner of the Olympians. Percy is determined that any deaths in the past be prevented at any cost.