What you need to do in order to tame the Wyvern is you first need a good bird to fly to the nest and pick up their eggs. (An Argintavis with 200% movement speed can outrun them) Once your back at your base, it needs to have a very hot temepature in order to incubate. (Easy tip: surround the egg in standing torches) While it's incubating you need to get milk. So what you can do to obtain the milk is knock out a female wyvern. Just simply have someone hold you while your shooting wyvern with tranqs. (Don't go for electric, or fire wyverns. Poison wyvern is your best bet) after its knocked out. Collect it's milk and head back to your egg. Put milk in a preserving bin with plenty of preserving salt so your milk don't expire. Put in 1 milk at a time. And watch over your wyvern, make sure you give it care when it needs it to give it an inscription bonus!
I tamed a 150 perfect argy, beefed him up to 20k health and 800% damage, straight up yoinked a level 165 wyvern egg(which i didn’t know existed, thought it went it 150), annihilated all the angry losers, hatched it, forgot I needed milk and it died, don’t be me
I got a level 150 lightning egg and I was so excited to hatch the egg...that when I went to put the egg down I accidentally ate it instead. :( ps4 users: R2 ISN'T GONNA DROP THE EGG YOU'RE GONNA EAT IT LIKE ANY OTHER EGG. REMEMBER THIS. LOGIC BEFORE EXCITMENT.
You can raise a wyverns without any milk. Tame a Daedon to heal the wyvern so it won’t die from hunger, and if you want full imprinting just put it in a cryopod then throw it back out if it asks for milk, that will change what they want