In a poem, this person retired to the woods of King Rhydderch (“RUH-therck”) where he lived in a house with seventy windows. This person was trapped under a large stone, a tree, or in an invisible tower by Viviane. (-5[1])This person revealed (10[1])that Vortigern’s tower couldn’t be built because a red and a white dragon were battling (10[1])below it. A story by Geoffrey of Monmouth explains that this person moved Stonehenge to honor the older brother of Uther Pendragon. T.H. White (10[1])fictionalized the idea that this person lives time backwards (10[1])and is continually growing younger. (10[2])This mentor of Morgan le Fey sealed the Sword in the Stone. For 10 points, name this magical advisor to King Arthur. (10[2])■END■