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. (10[1])This person revealed that Vortigern’s tower couldn’t be built because a red and a white dragon were battling below it. A story by Geoffrey of Monmouth explains that this person moved Stonehenge to honor the older (10[1])brother of Uther Pendragon. T.H. White (10[1]-5[1])fictionalized the idea (-5[1])that this person lives time backwards and is (10[2])continually growing younger. (10[1])This mentor of Morgan le Fey sealed the (-5[1])Sword in the Stone. For 10 points, name this magical advisor to King Arthur. (10[1]) (10[2])■END■