Summoner's History
The being known as the Summoner was the son of Apocalypse's First Horseman of War and Bracken, who would later be killed by Solem. He was born nearly 300 years ago, on the mutant island of Arakko as part of the highest rank of Summoners, a group of wizards able to summon various creatures of Arakko.
After his grandmother, Genesis, became one with the dark god of Amenth, Annihilation, the dark forces of the Amenthi daemons united with Arakko's mutant population. They decided to invade Krakoa, and so the Summoner was sent with a portion of Arakko to find his grandfather outside the Amenth dimensions.
Some time later, the Summoner sensed the presence of Cyclops and his children (Prestige and Cable) on the Arak Coral and approached them. As they couldn't understand each other due to their different languages, Cable gave a grenade to the Summoner as a sign of friendship, but he ended up accidentally setting it off. Mistaking it for an attack, the Summoner called forth a host of creatures to retaliate. In the ensuing battle, Prestige used her telepathic powers to make the Summoner understand them, and they cleared up the misunderstanding. After the Arak Coral united with Krakoa, the Summoner decided to remain there because of Apocalypse.
Later that day, the Summoner finally met Apocalypse and reported Arakko's situation to him, leading the mutant leader to promise he would protect all of his children, independent if they were from Krakoa or Arakko. The Summoner later invited Anole, Loa, and Rockslide to play a game about weakness that originated from Arakko. After the game, he told his grandfather the shared history of Arakko and Amenth before being directed towards the External Gate, a portal constructed on the bones of immortal mutants that linked Krakoa to Otherworld, a realm which was itself connected to Arakko. With Unus and Banshee by his side, the Summoner entered the portal so he could make his way back home.
While traveling through Otherworld beneath the Starlight Citadel, the Summoner reunited with his mother and the rest of the Horsemen leading an armada of daemons, and turned on Banshee and Unus. After capturing Unus, the Summoner returned an injured Banshee to Krakoa, and, alongside Apocalypse, he told the Quiet Council of Krakoa about the armadas of daemons. The Council initially decided to destroy the External Gate, but Krakoa refused to let them destroy the portal, instead choosing to send Apocalypse, the Summoner, and other volunteers to go fight the horde. After entering Otherworld, Apocalypse was reunited with his children, the First Horsemen, but they along with the Summoner attacked him. The Summoner then proceeded to kill Rockslide. The fight was broken up by the Omniversal Majestrix Saturnyne who offered each side to participate in the challenge of the Ten of Swords for victory, to which they agreed.
After Arakko's champions were gathered, he alongside the Swordbearers of Arakko went to the Starlight Citadel where the tournament would be held.