Patch 3.3.2 Undocumented Change
I haven’t had a chance to verify this rumor, but word on the street is that the “ledge exploit” in Halls of Reflection has been fixed. If you get behind the Lich King, he kills everyone.
Here’s a quick explanation: In Halls of Reflection the Lich King chases you and Lady Proudmoore and he puts up giant walls of ice to impede your progress to the exit and freedom. Lady P can destroy each wall, but it takes time. During that time, the Lich King sends waves of monsters after you—while slowly walking toward you and Lady P. If he reaches her before all the walls are destroyed, the encounter is over. It’s a challenge for everyone. The monsters are both made of hit points and hit very hard. The DPS, tanking, and healing all have to be good—and everyone has to work very fast.
However! Instead of running and following Lady P, you can instead run out to a ledge and wait for the Lich King to appear, walk past you, and then follow him. He still sends waves of monsters, but they take longer go get to you, thus, you have more time to kill each wave. So much more time that the difficulty of the encounter is reduced considerably.
But not any more, apparently. If the Lich King gets ahead of you (the only way that would happen is if you use the ledge exploit) then he turns and blasts everyone with a wave of death, ending the encounter right then and there.
Personally, I’m glad. I like this encounter in that it’s challenging even with people who have gear. You have to know what you’re doing and act as fast as you can. It’s a well designed encounter and the ledge exploit took the fun out of it.