One of the chess tiles ( -787, 101, -16 ) has a harvestable loose stone. Some people have said that when you collect it, it triggers a trap, spawning four linked 34^ a triggered guardian this does not always happen though. You will always recieve Tessa's Hidden Notes for Zannas regardless.
There are three mine openings, enter the rightmost mine at ( -1470, 118, 199 ).
Speak to a punished magi apprentice ( -1620, 48, -30 ). You must be able to speak orcish to speak to him. He wants the cleric helms from four a cleric of Hate to prove you are not a Crushbone spy.
Enter Crushbone Keep. Slay four clerics of Hate on the second floor in the Hall of the Magi ( 70, 25, -36 ) to obtain the cleric helms. Most of the other mobs in the room are PHs for the clerics of Hate. Clerics can also be found in Emperor's Chambers.
Extra credit if you can spot the movie reference in his dialog, and bonus points on top of that if you can name the movie! (post your answers to this articles talk page).
Enter Crushbone Keep and enter the instanced zone D'Vinnian Throne Room.