Trap Generator
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Poison Gas Trap
A lever is rigged to activate when pulled that causes pipes to open and release poisonous gas. The area has a weird smell and exposed pipes.
Effect: Targets all creatures within a 10 ft. square area, DC 15 CON save or take 7 (2d10) poison damage
Trigger: lever, activates when the wrong lever is pulled.
Countermeasures: A successful DC 15 Intelligence (Investigation) check allows a character to deduce the trap's presence. A successful DC 10 Dexterity check using thieves' tools disarms the trap, disabling the trigger. Unsuccessfully attempting to pick it triggers the trap.
Plugging all the pipes with cloth or other material will prevent the gas from escaping.Spinning Blades
An enemy in disguise asks for help and triggers the trap when the PCs get close, which releases spinning blades in the floor or walls. The blades move back and forth along a track, cutting up anything or anyone in their path. There's tall arrowslits in the walls and tracks on the floor.
Effect: Initiative +3, moves 60 ft. in a straight line each turn. If it enters another creature's space, 14 (2d10) slashing damage. Moves back and forth along a track.
Trigger: enemy, an enemy in disguise asks for help.
Countermeasures: A successful DC 15 Insight check can tell that the enemy is lying. A successful DC 10 Dexterity check using thieves' tools disarms the trap.
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) | 2 (1d4) | 7 (2d4) |
| Small (chest, lute) | 3 (1d6) | 16 (3d6) |
| Medium (barrel, chandelier) | 5 (1d8) | 21 (4d8) |
| Large (cart, 10x10 ft. window) | 3 (1d10) | 23 (5d10) |
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