For the ice Wyvern, head to the Treacherous ... If you’re having trouble finding a Wyvern egg in Ark Ragnarok, you can use its spawn commands to have it spawn directly in your inventory.

and spawning command. The only way to get an Ice Wyvern is by stealing its egg. For this, head to the Snow Biome and look for Wyvern Cave. Once you find the egg, pick it up and fly out of the cave ...