Gastric Caverns of Oramu
One-Page Dungeons: Gastric Caverns of Oramu
1. The Esophageal Sludge-Works
Level Range & Gimmick: Level Range: 3–5. The Peristaltic Pressure Valve: The dungeon floor is a series of interconnected, fleshy diaphragms. Every 1d4 rounds, the "Esophageal Pulse" occurs. Players must interact with "Sphincter Cranks" (DC 14 Strength) to vent the build-up of Blue Mucilage. Failure to vent causes the room to flood 3 feet deep with viscous slime. This creates Suffocating Sludge: all movement is halved, and any creature starting its turn submerged must succeed on a DC 13 Constitution save or be Restrained as the gravity-warping slime adheres to their limbs.
Tactical Challenge: The Bio-Acidic Slope: Most combat encounters occur on 45-degree organic inclines coated in slick bile. Moving "uphill" requires a DC 12 Athletics check. Any creature knocked prone slides 30 feet downward. At the base of every slope are Bile Vats. If a Bile-Gorged Cerulean Goblin is forced into a Vat, they undergo "Instant Super-Saturation," detonating in a 15-foot radius (4d6 Force damage) and spawning 1d4 minor Oozes that immediately roll for initiative.
The Loot: Huge Throbbing Treasure: A pulsating, translucent organ-sac containing the Amulet of the Azure Lung. This magic item allows the wearer to breathe normally while submerged in any liquid (including mucilage) and grants a +2 bonus to AC against Ooze-type creatures. Beside it lies 2,500 GP worth of refined Cerulean crystals and stolen gold bullion from the Human Kingdoms.
2. The Pyloric Reactor-Chamber
Level Range & Gimmick: Level Range: 6–8. The Volatile Atmosphere: The air here is saturated with aerosolized goblin bile. Any effect that deals Fire damage or creates a spark has a 50% chance of triggering a Chamber Flashover. All creatures in the room take 6d6 Fire/Force damage (DC 15 Dexterity save for half). To prevent this, players must use "Mucilage Hydrants" to coat themselves in inert blue slime. While coated, they are immune to the Flashover but suffer a -4 penalty to Dexterity checks and have their movement speed reduced by 10 feet.
Tactical Challenge: Floating Sludge-Rafts: The "floor" consists of semi-sentient rafts of blue sludge drifting over a lake of pure titan-acid. These rafts move 10 feet in a random direction at the end of every round. If two rafts collide, they "Fuse," creating a larger platform. If a player falls into the lake, they take 4d10 Acid damage per turn. Bile-Gorged Cerulean Goblins stationed on the walls use "Harpoon Tethers" to pull rafts apart or drag players into the acid.
The Loot: Huge Throbbing Treasure: A massive, vein-constricted chest found behind a pulsing flesh-valve. Inside is the Scepter of the Indigested King. This artifact allows the wielder to cast Cloudkill once per day, but the cloud is composed of Volatile Azure (dealing Force/Acid damage instead of Poison). The chest also contains 6,000 GP in the form of "Phials of Volatile Azure" (10 units) and rare alchemical reagents harvested from the titan’s marrow.