Build a 7x7x7 box with a behemoth gate on one side and a dino gate on the other connected to a keypad. On a 240% speed tapejara you can lure the wyvern through the behemoth gate and go through the dino gate to get it stuck then close both with the keypad. It clips through the box to shoot with tranqs, or you can make some walls open doorways/pillars.
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.