Age of Tyranny Series by Cameron Johnston

A city threatened by unimaginable horrors must trust their most hated outcast, or lose everything, in this crushing epic fantasy debut.After ten years on the run, dodging daemons and debt, reviled magician Edrin Walker returns home to avenge the brutal murder of his friend. Lynas had uncovered a terrible secret, something that threatened to devour the entire city. He tried to warn the Arcanum, the sorcerers who rule the city. He failed. Lynas was skinned alive and Walker felt every cut... moreA city threatened by unimaginable horrors must trust their most hated outcast, or lose everything, in this crushing epic fantasy debut.After ten years on the run, dodging daemons and debt, reviled magician Edrin Walker returns home to avenge the brutal murder of his friend. Lynas had uncovered a terrible secret, something that threatened to devour the entire city. He tried to warn the Arcanum, the sorcerers who rule the city. He failed. Lynas was skinned alive and Walker felt every cut. Now nothing will stop him from finding the murderer. Magi, mortals, daemons, and even the gods - Walker will burn them all if he has to. After all, it wouldn't be the first time he's killed a god... less

An outcast magician must risk his body and mind to save the world from horrifying demons, in the heart-pounding epic fantasy sequel to The Traitor God.Tyrant magus Edrin Walker destroyed the monster sent by the Skallgrim, but not before it laid waste to Setharis, and infested their magical elite with mind-controlling parasites. Edrin's own Gift to seize the minds of others was cracked by the strain of battle, and he barely survives the interrogation of a captured magus... moreAn outcast magician must risk his body and mind to save the world from horrifying demons, in the heart-pounding epic fantasy sequel to The Traitor God.Tyrant magus Edrin Walker destroyed the monster sent by the Skallgrim, but not before it laid waste to Setharis, and infested their magical elite with mind-controlling parasites. Edrin's own Gift to seize the minds of others was cracked by the strain of battle, and he barely survives the interrogation of a captured magus. There's no time for recovery though: a Skallgrim army is marching on the mountain passes of the Clanhold. Edrin and a coterie of villains race to stop them, but the mountains are filled with gods, daemons, magic, and his hideous past. Walker must stop at nothing to win, even if that means losing his mind. Or worse... less