Trap Generator
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Electrified Floortile
This trap uses a trip wire 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 (4d10) lightning damage
Trigger: trip wire, activates when wire is tripped.
Countermeasures: A successful DC 15 Wisdom (Perception) check will spot the trip wire, and a 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. The electricity will be drawn to metal and can be dampened by padding.
Poison Gas Trap
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 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 13 CON save or take 26 (4d10) poison damage
Trigger: button, a button labeled 'Do Not Press' (or similar) activates the trap when pushed.
Countermeasures: A successful DC 20 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. Plugging all the pipes with cloth or other material will prevent the gas from escaping.
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) | 7 (2d4) |
| Small (chest, lute) | 1 (1d6) | 7 (3d6) |
| Medium (barrel, chandelier) | 1 (1d8) | 18 (4d8) |
| Large (cart, 10x10 ft. window) | 7 (1d10) | 33 (5d10) |
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