Build a pen and a behemoth gate with pillars as a cage look alike ensure a llarge enough gap for an argy to fly in and then out . Lure a wyvern from the trench into you cage tranq it and steal the milk ensure you have meat and with salt to slow the spoil time aswell. Goodluck :)
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.