|Appearances:||The Tears of Uther Pendragon|
It's possible that the cave is also where Morgana spent a year, recovering from hemlock poisoning and learning how to control her powers, under the guidance of her half-sister Morgause. This may have also been where Morgause moved to after Arthur and Merlin went to her ruined castle, or it could just be a useful hideout for Morgause, close enough for Morgana to come and go from Camelot without her absence being noticed.
In this cave, Morgause prepared a potion in a big cauldron in which she threw a handkerchief, which had Uther's tears on it and a Mandrake root, that sank in the potion. The spell caused Uther to hallucinate, seeing people who had died because of his choices and actions before and during the Great Purge.