If you want to tame one of these you HAVE to do it this way or it won’t work. First you must find one and knock it out (I recommend you trap him with honey first and then knock it out. Second, once it’s unconscious press the button that’s indicated when you approach it to take primal crystals. After you’ve done all this you have to find one and if you’re a level 65 or higher (this is important) jump on his shoulder and lie down while u feed it the primal crystals, if you run out, feed it regular crystals and you’ve tamed yourself a crystal wyvern!