if you only made a few minor mistakes in Act I or Act II and have spare gold to spend.
It triggers the same script used in Broken World . dungeon siege 2 reset skill points work
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There is one notable caveat: the Amnesia Elixir refunds all skill points those invested in the Deep Pockets skill. The extra inventory slots provided by Deep Pockets remain permanently, and the skill points spent on them are not returned, regardless of whether you are actively using those slots. If you plan to use this method, invest in Deep Pockets only when you are absolutely certain about the decision. This link or copies made by others cannot be deleted
Because of this strict system, players in the base game must plan their builds carefully. If you accidentally put points into a magic school you do not use, those points are effectively wasted. Your only vanilla options are to keep playing with the current build, multi-class into a hybrid role, or start a completely new character from scratch. The Broken World Expansion: The Retrainer NPC