Stoneheim, dropped by
Arachnofiend,
Cave Dweller,
Centaur Avenger,
Colony Sentinel,
Deathstalker,
Foul Muck,
Giant Black Widow,
Hive Defender,
Necrospider,
Night Hunter,
Pack Wolf,
Purifier,
Red-Eyed Centaur,
Skraug Bigworviktor,
Skraug Bludfightor,
Skraug Munchhuntor,
Toll Troll,
Yoggoth Worm,
Unseen Bat, &
Shadow Demon, found in chests at Mordenthal's Dungeon & SH Crypt