Tame a high level male and female. Being to Scorched or Rag. Breed em and try to get a pair with high health and stam. Breed 20+ and imprint them all. Bring one into the Wyvern trench and steal an egg, bring back the Wyverns to you turrets and/or trap that you set up, repeat until you have an army of Wyverns. If your owl gets hurt, you can heal yourself with the freeze attack, and keep on going. If you can’t find any Wyverns, and your suspicious that there might be more around, use the thermal vision. Ultimate Wyvern tame. Gains speed when imprinted. 20/10 would spawn one in in every map.
They can thermally detect any living thing around you giving a strong pvp advantage. Like a night vision with wings. Plus they can put you and your allies in stasis and heal you whilst being an ice cube. Decent airborne mount -