I had read in one of the past dragonpooloza updates that there was an unbirth bound state added for the wyvern but for the life of me I cannot figure out how to trigger it. I have been considering donating to get access to the most recent content, but if actually getting to -see- the content is this much of a hassle of obscure conditions I have to meet ingame I simply can't say it's worth my time.
I've tried being both male and female with the TBM perk, alongside with having the unbirth ability on my character/s.