Do those things have something to do with the sconce in the tablet/imp room? I noticed that the names matched, and am guessing you have to put the flame out to spawn the dudes. So that leads me to another question, how to acquire the recipe for the stuff to put the flame out.
But yeah, this instance is a refreshing change from MC, and despite what some people said, the loot doesn't seem that bad to me, especially for how accessable it is.
And thanks for the prompt answers Bodom.