From HGWiki

Abode of the Shadow Lord (level 33 accomplishment (see Accomplishments)) and his minions, best to grab him (Bigby 7 or 9) if you can to stop him shadow stepping all around the room and beating down weaker characters, watch out as the Shadow Mastiffs have a habit of ignoring Greater Sanctuary.

Rest Spawn Chance

Zero

Creatures

• Shadow Mastiff
• Shadow Lord
• Shadow Guard

Exits

• Shadow Elves - Forest Village