While raising a crystal wyvern primal crystals are required to feed babies, to get primal crystals you must ko any type or gender of crystal wyvern. Usually easy with a good trap you can search for on YouTube.
When I find my first crystal wyvern egg: can’t wait to hatch this egg! Moments later after putting it in the flames of campfires oil fires and flamethrower flames:WHAT TOO COLD DO I HAVE TO PUT YOU IN A POOL OF LAVA!?!? After putting in a lava river:STILL TOO COLD?!?!