Trap Generator
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Falling Gate
A phrase etched on a wall is enchanted to trigger when read aloud, which makes an iron gate drop from the ceiling some distance behind, blocking the exit. The floor is cracked and damaged.
Effect: Targets all creatures within a 10 ft. square area, An iron gate drops from the ceiling some distance behind the trigger, blocking the exit. Any target underneath the gate makes a DC 10 DEX save or takes 5 (1d10) bludgeoning damage.
Trigger: forbidden phrase, activates when etched runes are read aloud.
Countermeasures: A spell or other effect that can sense the presence of magic, such as detect magic, reveals an aura of divination magic around the phrase. A successful dispel magic (DC 10) cast on the phrase destroys the trap.
The gate can be destroyed with an AC and HP based on its material (see destroying traps below).Floor Spikes
A door or passage is trapped and must be disabled by supplying it with power through the copper wires to clay batteries that need to be filled with acid or acidic fruit (like oranges) which can be found nearby. If power isn't supplied then the trap is triggered, which causes spikes to shoot up through the floor and impale anyone standing above. The floor is perforated or mesh.
Effect: Targets all creatures within a 10 ft. square area, Spikes shoot up through holes in the floor. Any target in the area makes a DC 10 DEX save or takes 9 (1d10) piercing damage.
Trigger: clay battery, copper wires stick out of a door or other way forward and must be powered by a clay battery to stop the trap.
Countermeasures: Putting acid or acidic fruit juice into the clay batteries and hooking up the wires disables 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) | 4 (1d4) | 5 (2d4) |
| Small (chest, lute) | 5 (1d6) | 9 (3d6) |
| Medium (barrel, chandelier) | 1 (1d8) | 13 (4d8) |
| Large (cart, 10x10 ft. window) | 9 (1d10) | 16 (5d10) |
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