I heard he moves to Duke's Archives later in the game. is there some sort of trigger for this? I have the Lordvessel and just defeated Nito and Logan is still at Firelink. do I need to buy out all of his spells to make him move? or will he automatically be there if I go to the Archives?
Yes. After that you talk to him and he should say something about moving on and then you find him in the archive in a cell, free him, meet him in the stacks, buy all his spells again, kill the boss, talk to him again, leave the area, go back to where he was in the stacks, grab the chest for most of his equipment, go back to where you first encountered the boss, kill him, grab his drops, and grab the ember in the middle of the room and continue on with the game.
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From: Erevile | #007 I never bought any spells before he went to the Archives. (Mostly because I had 9 INT and nobody would sell to me).
I'm pretty sure the info above about needing to buy his spells is wrong. I believe the actual trigger to him moving is if you have placed the Lordvessel at Firelink. I think he leaves after you have placed it and then left the area.
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