Will, as well as other wizards, lacks one opportunity that seems to have been cut from the game.
Namely, to capture Night Song in a soul cage, and gain an immortality buff that restores the character from 1 hp on the next turn after death. This is not imbalance, and would not break the game in any way, if the rest of the party is dead it = defeat.
This would give a real temptation to betray Night Song, because Lorokan's offer is nonsense that is not capable of tempting
A hint of a possible action is in the book that lies on Balthazar's corpse. But for some reason, Gale is not even offered such a super obvious choice in the Tower of Ramazit during the dialogue with Lorokan.
Which would be totally out of character for Wyll tbh. And Wyll is a warlock, not a wizard. Besides, there are canonically ways to stay alive longer in DnD - Elminster is an example as well as Volo and Jaheira contemplating a ritual. You don't need to be a douchebag to become nearly immortal, Lorroakan was just being lazy and untalented.
