What gift? Im struggling to think of anything at the end of act 2 that is given to Tav.
Edit: I thought some more on it, do you mean the astral gift? If thats the gift you took then you could play it like this: Emp used his persuasion to convince you to take the gift. You realized it was a trap and now you will use those powers to betray Emp. Free the person in the bubble and free yourself from the ghaik. You are restored to humanity if the BBEG dies. I tried to be mostly spoiler free in case you hadn’t played through fully already.