Trap Generator
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Bear Trap
A door or chest is rigged to activate when opened, which causes a set of iron jaws to spring shut, clamping down on a creature's leg. The trap is spiked in the ground, leaving the victim immobilized. The floor is covered in a dense layer of leaves or other loose debris to camouflage the trap.
Effect: +4 to hit (or DC 10) against one target, the jaws of the trap clamp shut, dealing 4 (1d10) piercing damage on a hit and the target is restrained until the trap is opened with a successful DC 10 STR check.
Trigger: door, activates when a door or chest is opened.
Countermeasures: Spotting the attached wire is a DC 15 Wisdom (Perception) check. A successful DC 15 Dexterity check using thieves' tools breaks the wire attached to the door 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 bear trap can be spotted with a DC 15 Wisdom (Perception) check and a DC 15 Dexterity check made with thieves' tools disables it.Water-Filled Room
A barricade is holding back the trap and breaking it open causes the trap to trigger, which makes the doors slam shut and the area gradually fill with water. The area is wet with small puddles.
Effect: Initiative +1, doors seal shut and room fills up with 2 ft. of liquid per turn, after 1+(CON bonus) minutes (min 1) of holding breath your HP drops to 0.
Trigger: barricade, a barricade is holding back the trap.
Countermeasures: Leaving the barricade alone avoids the trap.
The doors can be opened with a DC 15 Dexterity check using thieves' tools.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) | 5 (2d4) |
| Small (chest, lute) | 5 (1d6) | 10 (3d6) |
| Medium (barrel, chandelier) | 2 (1d8) | 19 (4d8) |
| Large (cart, 10x10 ft. window) | 3 (1d10) | 23 (5d10) |
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