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Guiding Light
Guiding Light
Uncommon
LightClass Actions
Used by the previous owner to access both the Underdark's darkest corners and her own basement, this ring seems to reflect light where there should be none.
Location - Guiding Light
Located in the 
Arcane Tower. To get it, you have to gain full access to the Arcane Tower and its upper floors. Located on the top floor, carried by Bernard (Lv. 4).
Discussion
Loot in the Underdark, from Bernard in the Arcane Tower.
Gale can absorb the Magic from this Item. If Gale consumes it, it vanishes forever. That is irreversible and unavoidable.
You may find this ring useless enough, but it opens secret doors in the tower. So only feed it, once you have found every floor in the tower.
(There is better food for Gale: Ring of Color Spray, Frayed Drow Hood, Sunwalkers Gift, Everseeing Eye Necklace, Exterminators Axe; Hunting Shortbow, Kormira's Locket, Spiderstep Boots.)