Medallion Of Justice
Modifies hit roll by 2 continuous. Modifies damage roll by 3 continuous. Armor class is 10-12.
Mobs, keys they have, approx. xp they give, and safe rooms are as follows:
Scaled Knight - sea Salt - 0
Amazon Warrior - golden Lariat - 20xp
Hawkman - downy Feather - 60xp
Green Knight - green Ring - 130xp - west to safe room
Red Knight - staff of Mercury - 155xp
Samurai ('test') - jade Buddha - 240xp
Dark Knight - belt of a Thousand Uses - 250xp
Warrior Chieftan - buffalo Horn - 350xp - east to safe room
Steel Golem - sculpted Ice Crystal - around 575xp
Zan and Jayna - around 700xp (no-quit room, south to exit)
Kill him for the scale of justice, which you then give to the floating wizard in Hall of Justice - mob is portable.
Now, continue north till you reach Zan and Jayna, who have the Medallion of Justice. There is a regen room west of the Green Knight and east of the Warrior Chieftan.
NOTE: This quest is for seriously big heroes - lords can't participate. Also, if you die along the way a CR can be difficult for several reasons, among them: this is a solo-only quest and you need to kill the mobs for the keys to move from room to room. On the plus side I know the last room at least (with Zan/Jayna) does allow someone to gurney you to your corpse but is no mercy. If you don't mind dying this is a neat trick to end up with two people fighting the gear mob, despite being a solo-only quest.