warcraft outlands instance

Help me identify this WORLD OF WARCRAFT dungeon/instance?
Here’s what I remember.
-It was a dark castle, made of stone.
-I had my hunter character on feign death while the rest of my group had died. Once I got up and walked around the room, enemies appeared out of the air.
And this may be a different instance, but I think it was the same.
-Some kind of bird shaman lady was a boss…? She was one of those bird people, in a smallish circular room… that’s all I remember.
-The ending boss was this guy who would summon up a bunch of skeletons for me to use my area attack on. He reminded me strangely of Zant from The Legend of Zelda??
-I -think- it was in the outlands, in some big arena like place?
It sounds like one of the instances in Auchindoun, in the Bone Wastes of Terrokar Forest.