The Deceptive Coffer of Frost-Spire Keep

Hidden within a drafty alcove of the stone fortress, the chest appeared to be a standard storage unit left behind by the garrison. Upon its defeat, the mimic's form melted away into a dark, viscous fluid, leaving behind the inorganic items it had swallowed but could not digest. The stone floor of the mountain keep is now stained with the acidic remains of the creature, revealing a few sparkling treasures and practical tools once belonging to an ill-fated traveler.