-Kill 10 Fallen Dudes
-Retrieve the Crown
Yes, I forgot to write the *halfling* down =p
There is a named NPC's in each of the "shade rooms." One is in the NW, the other is in the NE. There is also a named Vampire in the SE room. Each one will drop a clicky item. Take the item that looks like a claw and take it to the far north room (with the clickable torches). Click it on top of the statue, then click the torches to enter the maze.
The other two items are the Necronomicon and a Helm. These are probably related to the bonus item.
The King guy is in the center of the maze.
Quest reward was just Coins + XP, but there was a clicky item that was (Maybe?) supposed to be used on the King. It's possible you get something fancier if you do it "right." (See last line of this post?)
Lastly, the King teleports around at certain HP levels, and will summon the highest person on his hate list.
Everything in this instance (except the namers, oddly) hits crazy hard. Some seem to hit harder than others.
There is a hidden bonus item, but unsure of how to obtain it at this time.