MagisterCultuum
Great Sage
When Kylorin switched his devotion from Ceridwen to Nantosuelta, he lost all interest in holding any position of power or even respect. He just wants to live a simple life with the woman he loves. He would even not have accepted leadership of the Amurites if he had not considered it absolutely essential to for vanquishing Mulcarn and making the world a place where his wife would want to live. He would have preferred to leave the job to someone else, but did not think that there was anyone left capable of completing the task. He wet missing again not immediately after slaying Mulcarn, but after bringing the Heart of Sucellus (which had been locked away within Letum Frigus) to the Tomb of Sucellus and allowing the old God of Nature to be resurrected as the God of Life. Kylorin is still alive throughout the Age of Rebirth, but would rather not be noticed. The only sign we can see if him in the game is in the event triggered by the completion of the Ascension ritual, in which he delivers the Godslayer to the player so that someone else can slay the god this time.
(I rather like to believe that Kylorin left the Amurites to live among his old enemy the Illians, after finding Eve/Epona reincarnated as an Illian girl named Harna. He would then take the pseudonym of Joshua Ulvin and run a farm on the outskirts of the village of Brigdarrow. There he would raise a son named Auric, whom he would teach nothing about magic for fear of revealing his true identity. He would be away when the goblins hired by Gosea the Dwindling murdered his wife, and would then make the mistake of leaving the Illians to find her next reincarnation rather than waiting to discover that Auric Ulvin survived and needs his guidance. He would then suffer a great deal of guilt for allowing his own son to succumb to the influence of the sphere of Ice, and could not bring himself to harm Auric Ascended regardless of how much he knows he must be stopped.
This is just a wild theory though. It does not have a lot of support, it just seems cool and cannot be completely ruled out as impossible based on the dearth of information that Kael has revealed.)
(I rather like to believe that Kylorin left the Amurites to live among his old enemy the Illians, after finding Eve/Epona reincarnated as an Illian girl named Harna. He would then take the pseudonym of Joshua Ulvin and run a farm on the outskirts of the village of Brigdarrow. There he would raise a son named Auric, whom he would teach nothing about magic for fear of revealing his true identity. He would be away when the goblins hired by Gosea the Dwindling murdered his wife, and would then make the mistake of leaving the Illians to find her next reincarnation rather than waiting to discover that Auric Ulvin survived and needs his guidance. He would then suffer a great deal of guilt for allowing his own son to succumb to the influence of the sphere of Ice, and could not bring himself to harm Auric Ascended regardless of how much he knows he must be stopped.
This is just a wild theory though. It does not have a lot of support, it just seems cool and cannot be completely ruled out as impossible based on the dearth of information that Kael has revealed.)