Crystal wyvern easy passive tame. If server allows, run onto its back between the shoulders and feed it crystal in your last slot with [e]. On it's shoulders it will be less likely to drop you. Carry food and drink, have a flyer on follow if you can, and parachutes just in case.
Tropical wyverns spawn near the beach and have a water buff, like the spino, blood wyverns spawn in the forest that has red trees and also the red trees can give charcoal and blood wyverns can drain life from other creatures/ tames/ people and give your blood wyvern health if it is hurt at all. Ember crystal wyverns just breathe fire, blood and ember crystal wyverns are better for pvp. I recommend, if you have it, use the bone wyvern skin so they can’t tell what type of crystal wyvern it is. Good luck on taming them! (I play on Xbox so I can’t tame them :( )
Primal Crystal DOES NOT spoil slower in preserving bins or refrigerators. ONLY CRYSTAL WYVERNS CAN SLOW THE SPOILAGE. Simply put them in their inventory. With that being said, it is best to get taming immediately after gathering the primal Crystal.
To get Primal Crystals, you must knock out a Crystal Wyvern and harvest Primal Crystals off their back. Once you’ve harvested once, it’ll take about an hour for the Crystal Wyvern to "recharge" and allow you to harvest more.
The number of Primal Crystals that you can harvest from a Crystal Wyvern increases with its level. A level 1 produces 2 Crystals, and it increases by 2 at roughly every 7 or 8 levels.
Lvl 1: 2 Primal Crystals
Lvl 10: 4
Lvl 20: 6
Lvl 30: 8
Lvl 40: 12
Lvl 50: 14
Lvl 100: 28
Lvl 150: 52
Lvl 200: 54
Lvl 300: 80
Lvl 400: 108
The Crystal Wyvern has an extremely high torpor depletion rate — one of the highest in the game — so it will not remain knocked out for long. You might consider trapping it in a cage so that you can harvest it again later.