Trap Generator
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Boiling Tar-Filled Room
A pillar of light stretches the location. The trap is activated if the beam is broken by a creature or object and makes the doors slam shut and the area gradually fill with the caustic liquid. There's little puddles of the liquid about the area.
Effect: DC 15 to find, DC 20 to disable
Initiative +3, doors seal shut and room fills up with 2 ft. of liquid per turn, dealing 29 (4d10) damage. After 1+(CON bonus) minutes (min 1) of holding breath your HP drops to 0.
Trigger: light beam, a beam of light activates the trap when broken.
Spring Trap
A rope is attached to a mechanism in the ceiling. The rope is knotted and situated below a ledge or trapdoor, making it look like the rope needs to be climbed or pulled to continue. In reality the trap is triggered when the rope is pulled, which triggers a massive coil to spring up and launch the target. The floor is made up of large square panels.
Effect: One target, a massive spring coil flings the target into a wall or other trap/hazard. If catapulted into a wall, DC 13 DEX save or take 13 (4d10) damage
Trigger: pull rope, a knotted rope leading to a ledge above activates the trap when pulled.
Countermeasures: A successful DC 15 Intelligence (Investigation) check at the top of the rope will find the mechanism that activates when the rope is pulled. A successful DC 20 Dexterity check using thieves' tools disarms the trap, rendering the pull rope harmless. Since it may be difficult for characters to reach the top of the rope without pulling it, the ledge it leads to should be optional or have an alternate safe route to reach.
Destroying Traps
Traps can be damaged and destroyed, sometimes to good or bad effect. Pipes containing fire or poison will rupture and spray over the area, while mechanisms can be rendered inoperable with enough force. Determine the HP and AC of your traps based on the tables below. Sometimes a fragile trap is more dangerous than a resilient one if destroying it will fill the corridor with acid.
| Substance | AC |
|---|---|
| Cloth, paper, rope | 11 |
| Crystal, glass, ice | 13 |
| Wood, bone | 15 |
| Stone | 17 |
| Iron, steel | 19 |
| Mithral | 21 |
| Adamantine | 23 |
| Size | HP (Fragile) | HP (Resilient) |
|---|---|---|
| Tiny (bottle, lock) | 1 (1d4) | 5 (2d4) |
| Small (chest, lute) | 1 (1d6) | 5 (3d6) |
| Medium (barrel, chandelier) | 4 (1d8) | 16 (4d8) |
| Large (cart, 10x10 ft. window) | 8 (1d10) | 24 (5d10) |
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