Okay, so wyverns are only un Ragnarok, valguero, scorched earth if there is more I cannot remember, but you want to have a stanima leveled up pteradon or griffin to run away with the egg in Ragnarok, you can also use a gate trap to get the milk to grow up the wyvern but if not then use a deadon and get a whole bunch of meat and do it like that or use the milk. You can use 20 campfires or 14 air conditioners. You want a pteradon because they are actually fast.