First build a trap out of pillers and cellings there is some great ideas on utube once built you will need a large breeding pen as these grow in no time, make sure you have atleast 12 ac units or 25 campfires to incubate the eggs. They require wyvern milk every 2-3 hours at first depending on the level so for the first couple of days it's best to keep a female in the trap without leaving rendering distance. Shifts make this alot easier. Good luck
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.