After you have tamed one you can use it to kite same type wyvern's (ex fire and fire) to your trap and tank hits as you close the gate. It wont take damage from the same type of wyvern and the wild one will stay aggroed far easier than if you used an argy
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.