I think the reward for it is disappointing.
The best about it was the epic encounter itself.
But if you think about it carefully - the
is not that impressive.
If you steal the Wolfrune from Rath or safe Halsin, we can get a
Robe ( https://baldursgate3.wiki.fextralife.com/Poisoner's+Robe )
of equal worth.
And my "Robe dude" will never use anything else but Magic Missles anyways, even without the famous headpiece augmenting this spell.