Trap Generator
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Thunderwave Trap
A trivially easy riddle etched on a surface is enchanted to trigger when the answer is heard, which releases the spell stored within the trapped object. The object is covered in arcane symbols and writing.
Effect: +7 to hit against one target, Casts Thunderwave centered on the trigger with DC 14 (if relevant)
Trigger: false riddle, activates when an easy riddle is answered correctly.
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 riddle. A successful dispel magic (DC 14) cast on the riddle destroys the trap.
Casting dispel magic (DC 20) on the trap will cancel the stored spell.Thunderstone Mine
A door or chest is rigged to activate when opened, which detonates a thunder mine buried under the floor. The floor is pocked with small craters.
Effect: Targets all creatures within 20 ft., DC 14 DEX save or take 12 (2d10) thunder damage and become deafened for 1 (1d4) rounds
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 20 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.
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) | 6 (2d4) |
| Small (chest, lute) | 1 (1d6) | 6 (3d6) |
| Medium (barrel, chandelier) | 4 (1d8) | 17 (4d8) |
| Large (cart, 10x10 ft. window) | 2 (1d10) | 31 (5d10) |
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