Trap Generator
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False Stairs
This trap activates when a ruby or other valuable item is pried from a statue or other surface, that causes the stairs to fold in and create a perfectly smooth slide. Creatures on the stairs will fall and slide rapidly to the bottom. The walls are smooth with nothing attached to them.
Effect: Targets all creatures on it, steep stairs become a slick slide, causing targets to fall and take 27 (4d10) damage and be knocked prone
Trigger: removal trigger, activates when a gem or other valuable item is removed.
Countermeasures: A successful DC 20 Intelligence (Investigation) check allows a character to find a wire attached to the item which triggers the trap when pulled. A successful DC 20 Dexterity check using thieves' tools disables the trip wire harmlessly. A character without thieves' tools can attempt this check with disadvantage using any edged weapon or edged tool. On a failed check, the trap triggers. A web spell or similar can stop creatures from falling down the surface. A set of climbing tools can be used to safely scale the slide.
Guillotine Blade
A barricade is holding back the trap and breaking it open causes the trap to trigger, which drops a guillotine blade from a slit in the ceiling. There are slits in the ceiling camouflaged with vines or chains.
Effect: +11 to hit (or DC 14) against one target, 20 (4d10) slashing damage
Trigger: barricade, a barricade is holding back the trap.
Countermeasures: Leaving the barricade alone avoids 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) | 3 (1d4) | 8 (2d4) |
| Small (chest, lute) | 4 (1d6) | 11 (3d6) |
| Medium (barrel, chandelier) | 1 (1d8) | 15 (4d8) |
| Large (cart, 10x10 ft. window) | 8 (1d10) | 28 (5d10) |
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