After you kill a zombie infect player, creature, or NPC you'll become infected the plague that turns you into zombie. This plague now only takes one minute to increase your brain eating needs to epic levels.
Does this mean phase five is about to being? Update: Yes, it appears phase 5 is beginning.
We can't tell just yet, but we're all on the lookout for it. Phase 4 has brought lots of new rewards, events, and other fun things. Keep your eyes peeled, and if you see anything drop us a tip on our tip line!
Update: Almost all Argent Dawn Healers are gone. The only ones in IF I was able to find were near the flight path and the King's room.
WoW Insider likes us some braaaains!
Thanks to the many people who sent this in!