DiabloEditHearing of the demons plaguing the town of Tristram and of the ancient texts that could be found in the Tristram Cathedral. He joined with the Rogue and the Warrior heroes who had arrived in Tristram. Although the heroic group was able to solve the town's demonic problems, they paid a terrible price for defeating Diablo.
Driven mad by his experiences in Tristram, the Sorcerer began to believe that he was the powerful mage Horazon. He journeyed to Lut Gholein and found the way into Horazon's Arcane Sanctuary through a portal in the Lut Gholein Palace. By entering this portal, he created a rift into the palace that allowed a flood of demons into the royal building.
Calling himself the Summoner, he went on to attempt to control the powers of the Arcane Sanctuary. Demons overran the Sanctuary as he tried to control them. Soon, the Champions of Sanctuary made their way into the Arcane Sanctuary and slew the Summoner. According to Deckard Cain, he was likely dragged to Hell by the demons he had tried to control.