The Angmarim sorcerers are experimenting on their own people with the corrupted sarrowstone crystals.
'I know not why I am always surprised and horrified anew by the lengths the Angmarim will go to with their experiments, but this passage in the journal made my beard curl. Listen here:
'\qCrágacha has retreated back to her hole in the ruins, claiming the drakes she was working on are too powerful and deadly to be controlled. She had the audacity to suggest her tests on the drakes were a success and that maybe she could head back to the surface. Coward! Imbecile! Traitor!
'\qMy master has demanded more tests. More more more tests. My master in the muck. The bones are leaking. Leaking leaking. I told Crágacha that she was not done. Not done with the bones and the tests and the muck. She is now testing the crystals and the magic leaking leaking much magic spells the bones --\q'
Mother Amma breaks off, scanning the page and muttering.
'He goes on rambling for some time... what matters is that we know where they are holed up. Head over to the Angmarim camp and stop this madness!'
The Angmarim priest can be found in north-western Clovengap.
You should find and defeat the priest who is working to corrupt the deserting Angmarim.
Mother Amma is in Bazanmanar, in north-east Clovengap.
You should bring the new fragment to Mother Amma.