Stoneheim, dropped by
Acid Zombie,
Carrion Crawler,
Centaur Champion,
Centaur Sentinel,
Centaur Tracker,
Chaos Spawn,
Dark Warlord,
Foul Fiend,
Gauze Corpse,
Gremlin,
Neoflare,
Obsidian Assassin,
Ribbon Fiend,
Skraug Clangbangah,
Skraug Grubbringah,
Spectral Knight,
Wraith Bat,
Dark Noble,
Mad Berserker Demon,
A Skraug Sentry,
A Sentry &
Mortal Wombat, found in chests at Mordenthal's Dungeon