As stated before when we mentioned it before the molten hijack, there is an item that grants immunity to all forms of attack, but only for brief moments at a time.
What you will need to find is this item: Cracked Talisman - Item - World of Warcraft
You can only carry up to 3 of them and they drop from certain npc within the game.
Don't worry if this gets fixed or not, thanks to Skybro, the dev, we know there is a possible way to make this effect permanent through other means, but we are reproducing it to a science to figure it out, but for now, enjoy your emergency immunity.
Side Effects:
You will be purple, like in shadow form
You cannot attack, or use flight paths, for hackers, you can tele out of harms way or if in BG que you can escape.
You cannot cast on another player.
You can use anywhere but BG, Arena, possibly instances.
Working as of
Sargeras, Stormstout (and PTR) , Hellscream (and PTR) Molten/Warmane Servers.
There is a few we told about it, so you can be sure there will be some people who perfer to get this item before anyone else.
Thx Escy