today i was in a famous private server spamming around asking for a Black Temple party when an hunter asked me to invite him, i invited him and he said lets go.. i was like wtf we are 2, we need at least 10 people man, and he said: do you want your t6? i said ok lets see. He had a big bird as a pet, he said it was a bugged one.. His pet was invincible (like the death bug, infinite HP) and his melee attack was awesome lol.. His pet killed illidan (illidan has millions of HP..) with 2 hits!
So he told me that to have such a pet you have to tame a lvl43+ pet and let he learn the snake reflexes skill, because on antrix it is bugged (maybe on other emu servers too).
I didnt try but i see those bugged awesome pets everyday so its a bit unfair anyway.. If someone know if it works or not tell me