To tame it you have to steal a wyvern egg and you have to raise it from baby to adult. worst part is it WON'T eat anything other than wyvern milk which is found by knocking a female wyvern out, having a adult female wyvern, or killing a alpha male(female or male) which is most effective. Having a adult female wyvern is second most effective cause it keeps coming back every once in a while. Knocking one out(wild female wyvern) is least effective cause after doing that you have to let it go and get a new one or kill it and get a new one cause it only works once for a female wyvern that is wild
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.