Overlord Baylzuthak  

Confirmed 2/08/07 master chest dropped Chain of Torment Master I
Peniten's Sermon Adept I, Engraved Leather Pelt, Goblin Soothsayer Britchcovers

Since I haven't seen a detailed description of this zone anywhere I've looked, here's one.

Zone in, turn immediately left and kill a gorehorn elite. Open the door, clear all the mobs and leave the chest mob for last. Clear the chest mob. The door will lock.

This will trigger a spawn with a ^^ named, a down arrow named, and 4x double down mobs. Clear them. Easy.

Loot the key from the chest and go upstairs, when you walk in, the door shuts behind you.

A group of 4 gorehorns attacks you. When they die, another group with a ^ named and some one arrow down mobs will engage you. When they die, Overlord attacks.

He's not really that hard, but he's as hard as you expect a 42 named to be. When he dies, the Duke spawns and tells you to go kill Lord Rulgax. He's in an instance at the far south end of RE, past where the thing of shattered iron was.