Yeah, that's the fellow biggrin
No, seriously, that's for sure "Hermit" you mentioned wink .

Is he maybe out of potions?

You can always go back to Brocken Valley Village (via a Teleporter Scrine) and go shopping by Merchant Lamotte or Dr Needleman or the Priest or the Upton Miller or ... I think also Folo, the man with his pig "Kevin" (Bacon) wink or the Skeleton trader in Lovis' Tower ... his name I now forgot (how can I forgot such a funny trader?) ... think

On 7th of february 2015 : I start a new adventure in the Divinity world of Original Sin,
it's a Fantastic Freaking Fabulous Funny ... it's my All Time Favorite One !