Once inside the small botanical-themed facility you face level 29 Black Ring members. To the south and around the corner you find a book titled A Word of Warning (#2 on the map below) that discusses the Potion of Wisdom required for Allan's quest Wisdom in a Bottle (if he was chosen as your alchemist). Further down the hall you'll meet another of Damian's Generals, Geshniz. She drops the Potion of Wisdom when killed in addition to other loot. If you don't need the potion for the quest (i.e. Barbatos is your alchemist), you can drink it for a permanent 5 point boost to your Intelligence stat.