Nang Tu was a sorceress and high priestess who guarded "The All Seeing Eye," a fist sized diamond on the forehead of the giant Khotan Buddah statue, located in the hidden "Temple of the Man-Eating Spider," somewhere in the Himalayas, a few days climb from Kathmandu. Nang Tu appeared to be killed in personal combat with Merlin when he came looking for the All Seeing Eye.