This table transforms standard treasure rolls into immediate "Wait, why is the gold moving?" moments. Instead of just mimic chests, these entries turn the loot itself into the threat.
d100 Treasures as Monsters
| d100 | The "Treasure" | The Monster Identity / Twist |
| 01-05 | Loose Gold Pile | The Coin Swarm: The coins are actually the scales of a buried, gold-plated subterranean serpent or a swarm of metal-eating scarabs. |
| 06-10 | Jeweled Scepter | The Glass Parasite: The "gems" are dormant insectoid eyes. When gripped, the scepter's "shaft" (a segmented limb) wraps around the arm to feed on marrow. |
| 11-15 | Ornate Tapestry | The Loom-Wraith: It doesn't hang on the wall; it is the wall's skin. It peels off to envelop and suffocate the first person to touch the fabric. |
| 16-20 | Silver Chalice | The Liquid Mimic: The cup is real, but the "wine" inside is a highly acidic, sentient protoplasm that leaps at the drinker's face. |
| 21-25 | Leather-bound Tome | The Tongue-Binder: The bookmarks are actually thin, prehensile tongues. The book bites down on fingers and attempts to "read" the victim's memories. |
| 26-30 | Ancient Shield | The Iron Shell: A massive, flat crustacean that mimics a discarded heater shield. It remains still until a player tries to strap it to their arm. |
| 31-35 | Bundle of Silk | The Spinneret Snare: Not silk cloth, but fresh, sticky webbing from a Phase Spider that has been magically dyed to look like luxury trade goods. |
| 36-40 | Ivory Figurine | The Bone Homunculus: A tiny, carved idol that animates into a jagged, multi-limbed assassin once it enters a "safe" area (like a player’s backpack). |
| 41-45 | Heaping Coin Chest | The Hoard Golem: The chest is just the "head." The gold beneath it is the body of a construct that rises, using the coins as shifting, abrasive "flesh." |
| 46-50 | Ever-burning Torch | The Fire Elemental Spore: The flame is a tiny, hungry elemental. If fueled with oil or wood, it grows rapidly and attacks its "owner" to consume more heat. |
| 51-55 | Platinum Ring | The Choke-Band: A parasitic metallic worm. Once slid onto a finger, it constricts, burrowing into the skin to reach the bloodstream. |
| 56-60 | Stone Sarcophagus | The Litho-Vampire: The "mummy" inside is fake; the stone lid itself is a predatory organism that slams shut and dissolves the occupant. |
| 61-65 | Golden Necklace | The Gilded Constrictor: A clockwork or biological "snake" that waits until it is worn to tighten around the wearer's throat. |
| 66-70 | Crystal Ball | The Beholder Kin: A dormant, skinless eye of a deep-sea horror. It "shows visions" by telepathically luring the user closer to bite. |
| 71-75 | Suit of Plate Armor | The Hollow Stalker: Not a ghost, but a colony of carnivorous rust-mites that move the armor like a puppet to find more metal to eat. |
| 76-80 | Pouch of Rubies | The Blood-Gems: These are actually the hardened eggs of a Red Dragon Wyrmling or a Xorn. They begin to hatch in the warmth of a campfire. |
| 81-85 | Masterwork Bow | The Sinew Sniper: The "string" is a high-tension muscle. If pulled, it snaps back with lethal force and the bow unfolds into a spindly, wooden predator. |
| 86-90 | Cask of Fine Ale | The Yeast Beast: The fermentation has gone "eldritch." The liquid is now a Bloated Ooze that bursts the barrel when moved. |
| 91-95 | Jewelry Box | The Finger-Snapper: A miniature mimic specialized in taking small "snacks" (digits) rather than whole adventurers. |
| 96-00 | The "Magic" Sword | The Ego-Blade: A sentient weapon that doesn't want a wielder; it wants a host. It uses Dominate Person the moment it's drawn. |
Mechanical Twist: The "Looting" Check
To keep players on their toes without being unfair, you can implement a Detection Threshold:
Careless Looting: If players simply say "I grab the gold," the monster gets a Surprise Round.
Wary Looting: If they poke it with a 10ft pole or use Detect Magic/Evil, they get a Wisdom (Perception) or Intelligence (Investigation) check against the monster's Stealth.
The "Weight" Test: Many mimics or "living treasures" weigh significantly more (or less) than the objects they imitate. Mentioning a "strange lightness" to a gold bar is a classic "fair warning."
To complete the image, here is the entry for "The Stone Sarcophagus" mentioned in your table, as it appears on the same creature sheet.
56-60 | Stone Sarcophagus | The Litho-Vampire
"Many seasoned adventurers have learned to fear the crypts, but few realize that the most dangerous presence in the tomb isn't the ancient mummy inside, but rather the vessel it 'rests' in. The Litho-Vampire is a patient, long-lived mimic variant that disguises itself as an ornamental stone sarcophagus. It lies dormant for centuries, posing as a magnificent treasure, until unsuspecting looters attempt to claim it.
When a victim attempts to touch or open it, the stone 'lid'—the creature's true body—snaps shut with bone-crushing force. The sarcophagus doesn't simply trap its prey; it begins a rapid 'digestive' process. Its inner cavity is lined with razor-sharp granite teeth and dozens of small, blood-draining fissures that dissolve flesh, leaving only the stripped bones and metal treasure behind to further entice the next unwary victim."
Visual Description:
The creature sheet illustration would likely depict a seemingly normal, intricately carved stone sarcophagus, perhaps with a stone sculpture of a regal, deceased figure. However, a close-up might reveal the 'seam' of the lid to be a serrated, jaw-like fissure. Another panel could show the horrifying truth: the lid has slammed shut, and from beneath the base, small, segmented, crab-like stone legs begin to unfold as it slowly moves to a new feeding spot.
In Castles & Crusades, the Litho-Vampire (Stone Sarcophagus) functions similarly to a high-HD Mimic but with a focus on crushing force and environmental camouflage. It is a "Lurker" style monster, perfect for high-stakes dungeon crawls.
Litho-Vampire (Large Aberration)
Hit Dice: $8d8$ (HP 40)
Armor Class: 20 (Natural Stone)
Move: 10 ft.
Attacks: 1 Slam ($2d8$) or 1 Bite/Crush ($3d8$)
Special: Camouflage, Crushing Maw, Blood Drain, Immunities
Saves: Physical
Alignment: Neutral Evil
Experience: 1,200 + 8/hp
Special Abilities
Camouflage: In its dormant state, the Litho-Vampire is indistinguishable from a normal stone sarcophagus. It requires a successful CL 8 Wisdom (Perception) or Intelligence (Engineering/Stonecunning) check to notice the "seams" are actually organic joints.
Crushing Maw: If a creature attempts to open the lid or stands within the sarcophagus to loot it, the creature makes a Slam attack with +4 to hit. If successful, the victim is trapped inside. While trapped, the victim takes $3d8$ crushing damage per round and cannot cast spells with somatic components. Escaping the "grip" requires a successful CL 8 Strength check.
Blood Drain: Any creature trapped inside the "maw" automatically takes $1d4$ points of Constitution damage per round as the stone fissures begin to draw out fluids. If Constitution reaches 0, the victim is reduced to a dry husk.
Immunities: As a creature of living stone, it is immune to Sleep, Charm, and Hold spells. It takes half damage from piercing and slashing weapons but takes full damage from bludgeoning weapons and Transmute Rock to Mud.
Combat Tactics
The Litho-Vampire is a patient predator. It will often allow a party to defeat other guardians in a room just to ensure they are tired and distracted when they finally reach for the "big prize." It typically targets the strongest-looking adventurer first, hoping to snap shut and remove the frontline fighter from the board immediately.
