This tag is for questions relating to devices designed primarily to unpleasantly surprise and generally damage antagonists.

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40
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4answers
5k views

Resources for Complex Puzzle-Traps

I'm looking for resources for designing complex challenges - something that's not quite a puzzle and not quite a trap, but somewhere in between. There are tons of resources for really complex or off-...
33
votes
7answers
2k views

How many kobolds does it take to dig a Pit Trap?

I did some maths, based on PF SRD for both traps and crafting, and this is what I found : a Pit Trap is a CR-1 trap (but it's a lazy kind of trap, so let's assume, as PF SRD tells us to do, that it ...
27
votes
12answers
4k views

Traps specifically for Smart characters

Does anyone have examples or suggestions on creating traps that are harder for Smart (High INT/WIS) characters? Example: My NPC necromancer has set up his lair. In his arrogance he believes that ...
26
votes
12answers
4k views

How can I secretly notate which squares on a combat map are traps?

The party has ventured underground. One of the civilizations where they are is kobolds. I (GM) went trigger-happy with pit traps, falling block traps, and a couple of others. The kobolds have one path ...
24
votes
6answers
5k views

How would a 7th level wizard defend his shop?

So my players have been hired by a wizard to recover 3 copies of a spell he created. Three other wizards have copied the spell into secondary spellbooks (which required them to break a copy-...
23
votes
2answers
4k views

5E Trap/Ambush/Stealth Mechanics VS Passive Perception Confusion

I thought I knew, at first, how passive perception versus hidden/invisible creatures and/or well laid traps worked. I have a group of level 2 adventurers that are about to come upon their first trap ...
15
votes
5answers
2k views

How to keep the consequences of a player's actions a secret?

How can I make sure that a certain action of a player causes something to happen to the other players without the first player knowing it? For example: The player wakes up trapped in a coffin under ...
15
votes
6answers
3k views

How does one stop the rogue from trap checking every five feet

In our fourth edition game, our party's rogue has gained the habit of checking for traps whenever he moves anywhere. I find this annoying, not only because it stops traps from ever coming into effect,...
14
votes
2answers
301 views

Koschbasalt / Blaubasalt vs. Magic Traps

I hope there are even Das Schwarze Auge/The Dark Eye players around here... Is it possible to neutralize magic traps (traps created by applicatus or similar spells, not arcanovi) using Koschbasalt ...
13
votes
1answer
1k views

Does Detect Magic allow players to find magical traps without a perception check?

Consider the following scenario: The party enters a room that appears to be a dead end, but in fact has a secret door with a magical trap on it. While standing in the room, a member of the party casts ...
12
votes
1answer
487 views

At what point does a trap on a lock spring?

So a thief finds a chest which is trapped and locked (though he knows neither of these things at this point). He fails his find traps roll and assumes / risks that it's not trapped. At what point ...
12
votes
4answers
550 views

Does finding and removing a trap require one or two find/remove traps rolls?

Most of the question's above. I shall be running a campaign tomorrow where thieves and traps may have a higher profile than usual, and it occurred to me to wonder whether the thief skill of "find/...
12
votes
3answers
801 views

In Moldvay's Basic D&D, should the Thief roll twice to find a trap?

In Basic D&D, the default way to find a trap is to roll 1d6 and if you get 1 you find it. But thieves have a special % of finding it: e.g., a first level thief has 10%. Should we roll this % ...
12
votes
1answer
2k views

Can anyone search for traps?

I'm curious as to whether any character can search for traps, or only someone with an ability like the rogue's trapfinding ability.
12
votes
1answer
2k views

What is the weight of a laden adventurer?

There are a number of weight-based traps in the Starter Set's adventure, so when running the game I'll need to know the weights of the player characters. I was planning on getting them to do a quick ...
9
votes
3answers
671 views

Does exploration movement rate in Basic D&D (B/X) include trap/secret-door detection?

In the Basic Rulebook for D&D, on page B19, it states that characters can move 120' in a dungeon per turn (10 minutes). Later it states that this movement assumes players are mapping carefully, ...
9
votes
2answers
2k views

What are the rules for crafting traps that don't cost anything?

In D&D 3.5, crafting time is linked to the cost of the item created. But how is it handled when the item doesn't have a cost? Example: a group of PCs want to build a camouflaged pit trap to kill ...
9
votes
1answer
462 views

Inhaled poison and water breathing

Say you were a clever villain holed up in a dungeon where the only obvious way of entering was to swim quite some distance under water. Not to be put off by such obstacles, the heroes simply spend ...
8
votes
5answers
1k views

Remotely Disabling Traps — do I have to disable Disable Device to allow this?

How does D&D 3.5e handle the case where the means of bypassing or disabling a trap is located somewhere other than the trapped door/lock/...? For instance, take an electricity-based trap (such as ...
8
votes
3answers
3k views

What is the right way to GM magical trap detection?

I'm trying to understand the rules of perceiving magical traps, but I remain confused on some finer points. Let's say the PCs will encounter a Symbol of Weakness trap. The trap is on a door, and is ...
7
votes
4answers
2k views

Why is there such a big cost difference between Trap Crafting and a simple Bear Trap?

Trap crafting rules: The cost of a mechanical trap is 1,000 gp × the trap's Challenge Rating. If the trap uses spells in its trigger or reset, add those costs separately. If the trap cannot be ...
7
votes
4answers
245 views

How can I scale traps in a published adventure for a larger party?

I'm about to start DMing for a group of 7, mostly new to Pathfinder. I myself have not DMed Pathfinder before, and haven't played it recently. We'll be going through the Mummy's Mask adventure path, ...
7
votes
1answer
2k views

Can someone explain haunts to me?

It seems like haunts are just souped up traps. My problem is according to the book, they have some ridiculous requirements for getting rid of them. How would my party even know the very specific ...
7
votes
3answers
1k views

Handling Dungeon Traps?

How should standard dungeon traps be handled in Savage Worlds? For example: do characters get a Notice roll if they aren't searching for the trap? what should be the mod to spot a trap with Notice? ...
6
votes
2answers
273 views

How to get out of a pit?

Adventurer(s) have fallen into a pit and want to get out. Being the murderhoboes they are, they have not prepared for such an occasion. In fact, they are only wearing pitiful rags (that do not a ...
6
votes
1answer
817 views

How can a Sphere of Annihilation be detected, and how can it be “disarmed”?

I'm reading the DnD Essentials DM Book, and on the Sphere of Annihilation stat block, it mentions several things I don't exactly know how to read: The sphere has "Detect automatic". Does this mean ...
5
votes
2answers
1k views

Why do traps have an attack bonus?

Why do traps have an attack bonus in 5e? The rather short entry on Complex Traps suggests it may be relevant in their creation but none of the example traps seem to have any mechanics that an attack ...
5
votes
1answer
116 views

Would the “general nature of a trap” be its category?

The Find Traps spell says: You don’t learn the location of each trap, but you do learn the general nature of the danger posed by a trap you sense. Would that mean you know the category or type ...
5
votes
4answers
1k views

Ideas For a Dungeon With High CR [closed]

I have two games running in parallel in the same time space universe (but both groups play in different days) The group of evil, which are intermediate (average 12-14), and the group of good, which ...
5
votes
1answer
82 views

How do the areas of effect of spell traps' triggers and spells relate to each other?

I'm a little fuzzy on how spell traps work with being triggered, so let me set up an example: A Fireball trap. It hits a 20ft radius, all targets in that area. Triggered via proximity of the Alarm ...
5
votes
1answer
1k views

Are there any free tools for designing encounters or traps? [closed]

I'm trying to design a module and I was wondering if there were any free or open source encounter or trap designers for D&D 4e Mostly I just like something that lets me fill in the blanks and ...
4
votes
2answers
216 views

Can I be Wile E. Coyote, covering my tracks in bear traps?

I play a fighter who has the feat Quick Draw. After making the Str check to set a bear trap, there's no limit to the length of time the bear trap remains set. Dropping an item is a free action. Could ...
4
votes
2answers
521 views

Advanced rules or suggestions for traps/trapped items?

I'm working on a story concept where the villain is a tinker who is seeking revenge against a noble house, and his M.O. is intricate mechanical traps. The trap rules given are fine for dungeon ...
4
votes
1answer
84 views

How does the aftereffect work for the Spectral Tendrils trap?

There's a trap defined in the Dungeon Master Guide on page 91 called Spectral Tendrils. The Hit line of the trap's attack says: Hit: 2d10 + 6 necrotic damage and dazed until the end of the target'...
4
votes
3answers
112 views

Glyph of Warding with touch effects

I was DMing a game and eventually set up a scenario where the players had to choose between leaving their wagon, or bringing it to a dangerous place where it could be destroyed. The enchanter thought ...
3
votes
2answers
238 views

In D&D 3.5, is there a mechanism to resemble the use of a remote-controlled car?

Playing a 6th level halfling rogue in 3.5, and I'd like to replicate a door lock mechanism from a copypasta. The setting is sort of prone to Magic Mart syndrome, so access to 1-4th level spells wouldn'...
3
votes
2answers
372 views

Examples of “High Technology” Monsters/Traps in D&D

In my home-spun campaign, players are about to discover the ruins of an ancient city. Long ago, there was a civilization with an advanced level of technology, which is now dead. I'm thinking of ...
3
votes
2answers
301 views

How far does trap searching extend?

How far does trap searching (Passive or Active) extend? I.E If PCs enter a 30x30 room, and the perception beats the DC of a trap on the other side of the room do they see it?
3
votes
3answers
387 views

How does one trap a magic item?

As a GM, I would like to introduce a "trapped" magic item in one of my next adventures. The idea is that interacting with the item (detect magic, most probably, or touching it for a moment) would ...
2
votes
2answers
513 views

How can I get players to fall for this trap?

In 3 days I'm hosting a session and I devised a horribly fun trap. The trap kills them with a powerful poison in 1D4+2 rounds if they fail the consecutive saves. After the poison kills the target, ...
2
votes
2answers
207 views

Can I use Moondust as a splash weapon?

Would it be possible to carry moondust, from Sandstorm, in a flask and attempt to use it as a thrown splash weapon, forcing saves against suffocation? If so, how terrible of an idea is this? If ...
2
votes
4answers
283 views

Does D&D 3.5 allow cage-type (live catch) traps to be constructed?

It appears that the trap rules in D&D 3.5 do not make provisions for the construction and deployment of cage-type (live catch) traps. How would a party go about constructing and deploying one ...
2
votes
1answer
117 views

If the Cordon of arrows spell is cast and the target is within range when it's cast would it activate when they move?

For context: the target was invisible and near death. So we cast spike growth on the entrance with her in it and followed it up with a cordon of arrows. Basically target became visible and as it's ...
2
votes
3answers
89 views

Does a Shadow Conjuration Illusion have mass?

This is assuming the wizard in question has access to the spells Shadow conjuration or Greater Shadow Conjuration and uses it to duplicate the effects of major creation Let's say you're in trapped ...
2
votes
2answers
201 views

How to decide if traps in OSR play should be obvious? [closed]

Obvious traps emphasize interaction with the traps, which is often interesting. Hidden traps make unexplored regions of a dungeon far more dangerous and reward careful play and cunning, as players ...
2
votes
2answers
85 views

determining CR for trap involving repeated activation

can anyone please tell me how to determine the CR for a trap that has a duration of 10 rounds? it is a repeated steam jet trap that emits 2 steam jets every round and each steam jet deals 2 damage + ...
2
votes
1answer
66 views

What are the mechanics for special-trigger magic items?

I'm running a campaign in the Eberron campaign setting using the Pathfinder rule system. I'm confused about the mechanisms for crafting wondrous magic items that activate upon certain conditions ...
1
vote
3answers
915 views

What happens when you touch a Sphere of Annihilation?

In my DnD 4e group, they will stumble upon a Sphere of Annihilation (Tomb of Horrors) in the near future, they just don't know it yet - unless the wizard calls for an Arcana check. Now I, the DM, have ...
1
vote
1answer
147 views

Can a Trap-the-Soul enspelled Gem be thrown at it's target?

The Paizo/Pathfinder Spell "Trap the Soul", has two possible triggers. Spell Completion: First, the spell can be completed by speaking its final word as a standard action as if you were casting a ...
1
vote
1answer
115 views

Can an Alchemist's Bomb be used as a trap component?

Ok, this will be a tricky question. This is an idea I got recently when creating a character specialized in explosives. I looked for ways to mimic a proximity mine with non-advanced technology. My ...