In his years of banishment from Mythoss, Arethyr did not sit idly by waiting to be set free. Instead, he enlisted the help of the demon Belphegorr. A native of the prison realm, Belpegorr's ability to tear portals into the fabric of reality has afforded him a position of honor at Arethyr's side. When he was ultimately released, Arethyr acknowledged Belpegorr's role in weaking the barrer back to Mythoss, which sparked a bitter fued between the newly-crowned Dark Prince and the Legion of Arethyr's general, Gorgo Aetherblade.