There is a Mod called "Crystal wyverns regraded"

that adds crystal wyverns to every map that has

an wyvern trench. Taming is like a normal wyvern:

steal egg

-raise Baby (with primal crystals(i guess u get them from adult crystal wyverns)

-imprint

Utility:

They are Just Like normal Crystal wyverns but smaller and they have a dive like griffins