Stoneheim, dropped by
Acid Zombie,
Carrion Crawler,
Centaur Champion,
Centaur Sentinel,
Chaos Spawn,
Dark Warlord,
Foul Fiend,
Gauze Corpse,
Gremlin,
Mortal Wombat,
Neoflare,
Obsidian Assassin,
Ribbon Fiend,
Spectral Knight,
A Sentry,
A Skraug Sentry,
Skraug Clangbangah,
Wraith Bat &
Dark Noble, found in chests at Spider Cave & Centaur Cave