Trap Generator
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Poisoned Ballista Turret
An enemy in disguise attempts to direct the PCs into the trap by lying about where they need to go and triggers the trap when the PCs get close, which causes a hidden ballista to fire. There are lots of tall arrowslits in the walls.
Effect: +6 to hit (or DC 16) against one target, 20 (4d10) piercing and poison damage
Trigger: enemy, an enemy in disguise directs the PCs into the trap.
Countermeasures: A successful DC 15 Insight check can tell that the enemy is lying. A successful DC 15 Dexterity check using thieves' tools disarms the trap.
Spore Trap
A doorknob is trapped to activate when it's turned the wrong way, which opens vents in the floor and releases poisonous spores into the area. The area has a strange smell and is covered in mushrooms.
Effect: Targets all creatures within a 10 ft. square area, Poisonous spores are released which deal 26 (4d10) poison damage and DC 16 CON save or be poisoned for 1 hour.
Trigger: doorknob, activates when the doorknob is turned the wrong way.
Countermeasures: A successful DC 15 Intelligence (Investigation) check allows a character to deduce the trap's presence. A successful DC 15 Dexterity check using thieves' tools disarms the trap, disabling the trigger. Unsuccessfully attempting to pick the door triggers the trap. A strong gust of wind (at least 10mph) will disperse the spores.
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) | 2 (1d4) | 8 (2d4) |
| Small (chest, lute) | 3 (1d6) | 13 (3d6) |
| Medium (barrel, chandelier) | 6 (1d8) | 16 (4d8) |
| Large (cart, 10x10 ft. window) | 8 (1d10) | 30 (5d10) |
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