Trap Generator
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Thunderstone Mine
An area is warded with a detect magic spell. When magic is detected within the spell's radius the trap is triggered which detonates a thunder mine buried under the floor. The floor is pocked with small craters.
Effect: Targets all creatures within 20 ft., DC 15 DEX save or take 26 (4d10) thunder damage and become deafened for 3 (1d4) rounds
Trigger: magic detection, activates when magic is detected in an area.
Countermeasures: A spell or other effect that can sense the presence of magic, such as detect magic, reveals an aura of divination magic around the area. A successful dispel magic (DC 15) cast on the area destroys the trap.
Earthmaw Trap
An enchanted eyeball watches an area. The trap is triggered when the eye sees movement within its periphery, which causes the floor to open up, spilling the intruder into the trap below. The floor is made up of loose dirt or mud, and there are runes in the area.
Effect: +10 to hit (or DC 15) against one target, 16 (4d10) piercing damage
Trigger: motion sensing eye, an enchanted eyeball watches over the area.
Countermeasures: A spell or other effect that can sense the presence of magic, such as detect magic, reveals an aura of divination magic on the eye. A successful dispel magic (DC 15) cast on the eye disables 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) | 2 (1d4) | 6 (2d4) |
| Small (chest, lute) | 1 (1d6) | 5 (3d6) |
| Medium (barrel, chandelier) | 1 (1d8) | 16 (4d8) |
| Large (cart, 10x10 ft. window) | 9 (1d10) | 22 (5d10) |
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