Must have the mark of air to enter his room; if you do not have this mark, you will be instaslayed in CPK.
Jatzpek is in room with no visible exits, but you can calm and exit down. The tank should focus high armor, since Jatzpek scales to form size. Was done with 3 on my encounter.
You now can be formed in his room. He is dispellable via redemption, timepiece, and he has a healing script so form should have high damage. Once you're out of combat, his script kicks in, so stay in combat as long as possible. Calm herbs are a plus but not a necessity.
You have killed a new boss, Jatzpek the Monastery Avatar. You gain 82 practices! Your alignment changes by -99. You feel more evil. Ill humors leave you as the curse from one of the mummies of Frosthold is lifted.
IF YOU DO NOT HAVE MARK!!!!!!
'Jinxt!' Jatzpek the Monastery Avatar exclaims. 'You have not pledged yourself to the Power of Air..!' Jatzpek the Monastery Avatar begins muttering an incantation and making arcane gestures... Jatzpek the Monastery Avatar has completed his casting. There is a resounding CRACK as nine lightning bolts fork from the sky towards Jinxt. An albino lobster fades into existence. An albino lobster has been slain!