When fighting ragnaros, die while casting a spell (ie. frost bolt), and exit the game(make sure your soul is not stored and you are not rezzed)

when you return, your life and mana will both be at 1, and you will neither take damage, nor will mana be used up while casting (this effect ends when you log out)

Might be mage only

could u elaborate... upon dieing, do u logout then hit "release spirit" before timer goes to one

this is kinda stupid because the whole fight is only 5 minutes long...there could be a que line, there could be other general garbage...and if you alt f4 out of the game like this it will hold on to your character for another minute or two before it officially logs u out...so this is worthless :p

So cast a spell during rag, die, exit game, and you are invincible?

Hmm... me liek!

Can you use the exit game button in main menu?

Can you do something insane like solo Nef? Or even better, C'thun? Or wtfpwn AV?

*shivers*

A party of invulnerable mages... RUN!

A raid of invulnerable mages... NO ESCAPE!

i give it a try but seems that the 1.11.2 fixed it !