
Considering crystal wyverns eat crystals, they should be able to harvest crystal. The tropical one could maybe get a stamina buff while in water, like unlimited stam for 30 seconds after touching water. Maybe a brief damage buff or a buff to hp, but only while touching water. I'm not suggesting all of these be applied, just one. Otherwise it would be way to over powered compared to the other crystal wyverns.
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 :( )