Miscellaneous Trap Features
Pathfinder Core Rulebook, page 419
Some traps include optional features that can make them considerably more deadly. The most common features are discussed below.
Alchemical Item: Mechanical traps might incorporate alchemical devices or other special substances or items, such as tanglefoot bags, alchemist’s fire, thunderstones, and the like. Some such items mimic spell effects. If the item mimics a spell effect, it increases the CR as shown on Table 13–3: CR Modifiers for Mechanical Traps.
Table 13–3: CR Modifiers for Mechanical Traps
| Feature | CR Modifier |
|---|---|
| Perception DC | |
| 15 or lower | –1 |
| 16–20 | — |
| 21–25 | +1 |
| 26–29 | +2 |
| 30 or higher | +3 |
| Disable Device DC | |
| 15 or lower | –1 |
| 16–20 | — |
| 21–25 | +1 |
| 26–29 | +2 |
| 30 or higher | +3 |
| Reflex Save DC (Pit or Other Save-Dependent Trap) | |
| 15 or lower | –1 |
| 16–20 | — |
| 21–25 | +1 |
| 26–29 | +2 |
| 30 or higher | +3 |
| Attack Bonus (Melee or Ranged Attack Trap) | |
| +0 or lower | –2 |
| +1 to +5 | –1 |
| +6 to +10 | — |
| +11 to +15 | +1 |
| +16 to +20 | +2 |
| Touch attack | +1 |
| Damage/Effect | |
| Average damage | +1 per 10 points of average damage |
| Miscellaneous Features | |
| Alchemical device | Level of spell mimicked |
| Automatic reset | +1 |
| Liquid | +5 |
| Multiple targets (non-damage) | +1 |
| Never miss | +2 |
| Proximity or visual trigger | +1 |
| Poison | CR of poison | Poison | CR of poison |
|---|---|---|---|
| Black adder venom | +1 | Malyass root paste | +3 |
| Black lotus extract | +8 | Medium spider venom | +2 |
| Bloodroot | +1 | Nitharit | +4 |
| Blue whinnis | +1 | Purple worm poison | +4 |
| Burnt othur fumes | +6 | Sassone leaf residue | +3 |
| Deathblade | +5 | Shadow essence | +3 |
| Dragon bile | +6 | Small centipede poison | +1 |
| Giant wasp poison | +3 | Terinav root | +5 |
| Greenblood oil | +1 | Ungol dust | +3 |
| Insanity mist | +4 | Wyvern poison | +5 |
| Large scorpion venom | +3 |
Gas: With a gas trap, the danger is in the inhaled poison it delivers. Traps employing gas usually have the never miss and onset delay features.
Liquid: Any trap that involves a danger of drowning is in this category. Traps employing liquid usually have the never miss and onset delay features.
Multiple Targets: Traps with this feature can affect more than one character.
Never Miss: When the entire dungeon wall moves to crush you, your quick reflexes won’t help, since the wall can’t possibly miss. A trap with this feature has neither an attack bonus nor a saving throw to avoid, but it does have an onset delay. Most traps involving liquid or gas are of the never miss variety.
Onset Delay: An onset delay is the amount of time between when the trap is sprung and when it deals damage. A never miss trap always has an onset delay.
Poison: Traps that employ poison are deadlier than their nonpoisonous counterparts, so they have correspondingly higher CRs. To determine the CR modifier for a given poison, consult Table 13–3. Only injury, contact, and inhaled poisons are suitable for traps; ingested types are not. Some traps simply deal the poison’s damage. Others deal damage with ranged or melee attacks as well. See page 557 for more information on poison.
Pit Spikes: Treat spikes at the bottom of a pit as daggers, each with a +10 attack bonus. The damage bonus for each spike is +1 per 10 feet of pit depth (to a maximum of +5). Each character who falls into the pit is attacked by 1d4 spikes. This damage is in addition to any damage from the fall itself, and the statistics presented above are merely the most common variant—some traps might have far more dangerous spikes at their bottom. Pit spikes add to the average damage of the trap (see Average Damage, below).
Pit Bottom: If something other than spikes waits at the bottom of a pit, it’s best to treat that as a separate trap (see Multiple Traps) with a location trigger that activates on any significant impact, such as a falling character.
Touch Attack: This feature applies to any trap that needs only a successful touch attack (melee or ranged) to hit.