Once you have a Greater Magic Wand, use the Wild Magic Essence to combine the two, and take the resulting Gnarled Wand of Wild Magic Hypnotic Crystal back to Jixo in Stonetalon.
Pleased with your items, Jixo creates Wyvern Taming Wand and will now give you another quest, Then Jixo disappear never finished the quest. The spawn by the hut after a few minutes, it is still stuck on the part to follow him.