The Summoner

The Summoner is the Sorcerer from Diablo I, driven to madness by the Lord of Terror. He is a Super Unique monster in the Arcane Sanctuary in Act II. He is found near Horazon's Journal, on a platform with six glowing glyphs. Killing him ]completes the quest The Summoner.

Tips and Other Additional Information
Though his magical attacks are strong and deadly, The Summoner has little health and defense, making physical attacks very effective against him; a quick kill is almost guaranteed once you reach him. His Cold attacks such as Glacial Spike can be quite annoying, Freezing or Slowing you. Bringing Thawing Potions and gear with Cold Resistance should limit the damage. Never standing still to make you a sitting target for The Summoner's magic attacks also helps.

The Summoner stands on a platform, but he is not alone. Usually there are several Goatman and Vampire near him. The Goatmen can be especially troublesome as they block the corridor, preventing you from moving towards The Summoner and making you a sitting duck to his cold attacks and the Vampires' fire attacks. Lure them away and kill them out of range of his spells. Once the coast is clear, you should have little trouble killing The Summoner.

Note: Do not bother opening a town portal after defeating the Summoner. Upon reading the tome of Tal Rasha, a special portal is opened to the Canyon of the Magi. A few steps takes the player to the waypoint, from where the town is immediately accessible.