This has been posted before I think with some lame ass macro that didnt work, although I have figured out how this bug actually does work.
You need a DoT on you.
Works better with Crippling Poison. (dont ask why, it just works)
I think CP works because it slows down your actions.
When the DoT is on you need to time it right before the last tick that would kill you and cast Blessing of Protection. Excuse me, dont use it. Spam the button.
If you pull it off you wont be able to be killed until your either hearth or leave your zone. Kinda shitty that you can't travel with it I know but I dont make the rules of the exploits.
Although we brought a horde member outside of Sunwell put a DoT on my paladin and ran into the instance. Took about 8 attempts to pull off but finally got it to work.
I tanked the entire instance and got all the way to Muru, idiots started die'n so we skipped him and went to Kil'Jadin. We killed him after 53 minutes of annoying noobs taking the aggro from me. Oh did I mention, the pain with this is you can't cast some spells. I was spec'd holy so i didnt really have that much of aggro pulling thus the pain in the ass we went through.
None the less, have fun! :yuck:
Also everyone knows I use a laptop around these hours (night time) and I cant screenshot so trust me on this one.
Edit: BoP has a CD. We are all aware of this. Before I get shit thrown at the front door about this. Your not trying to SPAM BoP mutiple times. - We are just spamming it because thats what I did when I was doing this each time. I mean, plus your facing a DoT's final tick so hey why not crank the button for SNG's.