Super easy... Yep... Just bring 50 Crystals (if low level) and bring 110 Crystals (if high level) and wait until its landed and go run super speed and jump on its back. Feed Crystals and continue until its tamed. Primal Crystal: Grab a Grappling Hook with Crossbow then shoot it and knock it out with Darts then Parachute yourself then land. Last thing to do open its inventory then enjoy your 5 Primal Crystals per-wyvern.