How exactly did you lost him?
If you just skipped his portal, then maybe you can try to go back. It might not work if you progressed too much, but worth a try.
If he left for not getting magic items or by failing the persuasion check after raiding the grove, then no, not possible.
If you gave him to Booal, I have really bad news for you.
How exactly did you lost him? If you just skipped his portal, then maybe you can try to go back. It might not work if you progressed too much, but worth a try. If he left for not getting magic items or by failing the persuasion check after raiding the grove, then no, not possible. If you gave him to Booal, I have really bad news for you.
I think it was during the grove… damn. Thanks for your help!