My chronology as best I can reconstruct it :
Ketheric, Melodia and Isobel are devout Selune worshippers as is the whole area of Eithrim. Ketheric is the leader of this area ( baron whatever)
Melodia dies. Ketheric is heartbroken.
Aylin comes to this Selunite area, probably sent with a purpose to this Selunite lkand. Love fires up between her and Isobel. Ketheric doesn't like it.
Isobel dies. Ketheric breaks down.
Ketheric turns to the Lady of Loss to attempt to live with his pain. He forcibly converts everyone to Shar, constructs Moonrise towers and the Gauntlet to build a Dark justiciar army and export his Shar-tiranny to the surronunding lands . As part of the Gauntlet construction, he has Aylin imprisoned in the Shadowfell as final act for the DJ ritual.
As a boon for his efforts for Shar, Ketheric gains immortality from Aylin's situation.
Harpers and Druids mobilize against the Sharran threat.
Raphaël has the gauntlet destroyed.
The DJ army is too weak now to resist the Harpers and Ketheric is defeated.
Ketheric lays the shadowcurse on his land, using Sharran magic.
Up to that point Ketheric remains a fanatic Shar follower.
Speculation : Plan to create the absolute is set in motion by the dead 3 after these events.
While the chosen of Bhaal and Bane get their hands on the nethercrown, Myrkul sees an opportunity to use Ketheric's weakness and has one of his devout, Balthazar, revive Isobel. The absolute needs Ketheric because they know of the mindflayer colony below Moonrise towers and have chosen this place to get the elder brain.
Ketheric turns his devotion to Myrkul, as the dead God had anticipated. To make him part of the absolute plan he becomes Chosen of Myrkul. Why does Shar not act immediately to punish this, or at least withdraw his immortality ? Big question.
Isobel "does not recognise her father anymore" and manages to get away to last light inn.
As a Shar apostate, Ketheric knows he must get Aylin out of the shadowfell if he wants to keep her under control. Balthasar is sent away to bring her to Moonrise.
Now all chronology is breaking down rapidly, because in a short time, hundreds of "true souls" are abducted, the astral prism is stolen by Shadowheart and entered into by the Emperor. Jaheira and a brigade of Harpers and Fists find refuge in Last Light inn , in order to find out the means that absolutists use to survive the shadow curse. All this time, Shar does nothing to stop the absolute or punish Ketheric. Whereas poor Shadow is constantyl tormented by Shar.
Maybe it was all a test, a trial for Shadow, concocted between Selune and Shar. Typical God-cruelty using mortals as playthings.
