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[4]-5[1])This person (10[3])revealed (10[1])that Vortigern’s (10[2])tower (10[1])couldn’t (10[2])be built because a red and a (10[1])white (10[1])dragon (10[1])were battling (10[2])below it. (10[2])A story by Geoffrey of Monmouth (10[1])explains that this person (-5[1])moved Stonehenge to honor the older (10[1])brother (10[3])of Uther Pendragon. (10[1]-5[1])T.H. White (10[2]-5[1])fictionalized the idea (-5[1])that this person (10[1])lives time (-5[1])backwards (10[2])and is (10[2])continually (10[1])growing (10[1])younger. (10[3])This mentor (10[1]-5[1])of Morgan (10[1])le (10[1])Fey sealed (10[1])the (-5[1])Sword in the Stone. For 10 points, (10[1])name this (-5[1])magical advisor to (10[1])King Arthur. (10[1]) (10[7])■END■