Trap Generator
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Swinging Spike Wall
A pedestal with a button labeled 'Do Not Press' (or similar) sits in the center of the area. Creatures that push the button trigger the trap which makes a spike-covered wall suddenly swing across the target area, impaling anyone caught by it. The walls are covered in stained spikes.
Effect: Targets all creatures within a 10 ft. square area, a spike-covered wall quickly swings out and impales targets, DC 13 DEX save or take 10 (2d10) piercing damage.
Trigger: button, a button labeled 'Do Not Press' (or similar) activates the trap when pushed.
Countermeasures: A successful DC 10 Dexterity check using thieves' tools disarms the trap, removing the trigger from the button and allowing it to be pressed as many times as you want. Unsuccessfully attempting to modify the button triggers the trap. Alternatively a creature may be able to build up the incredible willpower necessary to resist the temptation to push it.
Electrified Floortile
A denizen of the lair is hiding nearby out of sight watching for intruders to enter the trap's radius. When a hostile creature is spotted, the sentry pulls on a rope that causes electricity to course through conductive poles in the floor and electrocute anyone standing on them. The floor is metal or has holes in it where the tops of the poles stick through.
Effect: Targets all creatures within a 10 ft. square area, DC 13 DEX save or take 18 (2d10) lightning damage
Trigger: sentry, a sentry is hidden in a hole or around a corner with a rope that activates the trap when pulled.
Countermeasures: The sentry is a regular denizen of the dungeon, stealthed in a nearby hiding spot. A successful DC 10 Wisdom (Perception) check spots the sentry, and the sentry will activate the trap when they see enemies standing within range of it. Disabling, avoiding, or scaring off the sentry will render the trap harmless. The electricity will be drawn to metal and can be dampened by padding.
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) | 4 (2d4) |
| Small (chest, lute) | 6 (1d6) | 5 (3d6) |
| Medium (barrel, chandelier) | 2 (1d8) | 17 (4d8) |
| Large (cart, 10x10 ft. window) | 6 (1d10) | 35 (5d10) |
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