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Questions tagged [environmental-hazards]

For questions about obstacles or dangers presented by natural forces.

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138 views

Is there an inexpensive general way to make items forever immune to energy damage?

Some monsters live in environments that deal constant energy damage so that any stuff left nearby is destroyed. Other monsters have special abilities that deal energy damage over a wide area and ...
19
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1answer
2k views

What is “desert glass” and what does it do to the PCs?

In Xanathar's Guide to Everything, there are environment-specific encounter tables for various PC levels. In the Desert Encounters (Levels 11-16) on pages 96-97, the result of 36-40 is "1d6 square ...
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4answers
650 views

What natural barriers could help when running away from a lightning elemental?

Players are trying to steal magical items from Powerful Elemental Beings. They are not able to fight with them, so they need to somehow find a way to outrun them, preferably using environmental ...
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0answers
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What is the appropriate damage for landing on someone's head from a certain height [duplicate]

Is there guidance in any of the source books on damage taken when something falls on a creature? For my new Loxodon Monk (you may have read about him) I'm planning on Shadow Stepping to a ceiling (...
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5answers
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If I spontaneously find myself in an environment I can’t breathe in, am I automatically holding my breath?

Sure, if I want to dive down into the underwater cave or explore a mineshaft with unbreathable air, I can announce that my character holds his or her breath. I would be fine for 1 + CON modifier ...
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2answers
636 views

Does Fire Form affect a Water Elemental?

According to a Fire Elemental's "Fire Form" ability: The first time it enters a creature's space on a turn, that creature takes 5 (1d10) fire damage and catches fire; until someone takes an action ...
6
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2answers
278 views

What mechanics can be used to make the environment itself into a challenging adversary for the players?

Most RPGs leverage combat as a main source of mechanical conflict. From what I can tell, this tradition stems from RPG's heritage in tabletop war games, and to this day combat remains a staple of the ...
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2answers
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What happens if you're healed while drowning?

So when you're drowning, and you fail your con check, you drop to 0 hp and are unconscious. In the next round, you drop to -1 and are dying, and in the following round, you are dead. It looks like ...
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5answers
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Does skipping an ability check for a hazard needed to advance the dungeon remove player agency?

I'm currently running a sort of mega-dungeon made of other dungeons cobbled together. I know most of my players browse here frequently so I'll keep the description brief. At the end of the current ...
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2answers
2k views

Does the boiling mud stay on my character when I teleport?

My character fell into boiling mud and I used misty step to get out. When I teleport am I still covered in boiling mud, and will I continue to take damage?
2
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1answer
203 views

What happens if a bag of holding is destroyed by acid?

Our character is carrying a bag of holding. He is being grappled by a black pudding. The black pudding has done enough damage to the bag of holding. What happens to the bag and its contents?
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2answers
375 views

What damage does one’s clothes bursting into flame deal, and what is needed to put it out?

The Phoenix Soul Sorcerer can ignite flammable objects like cloth with a touch. How should I handle this when a player playing such a character in one of my games ignites an enemies clothing? ...
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3answers
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When should I ask for a saving throw, as opposed to an ability check, for environmental hazards?

When writing or GMing an adventure, frequently there will be situations that test the PC's physical abilities to cope with a threat. Examples include: The building the party is in is collapsing, and ...
3
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1answer
603 views

How fast does fire spread?

In our latest session my group ran into an awakened tree. We have managed to set it on fire, however there is also a giant spider and some webs in the awakened tree's branches. How many turns does it ...
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4answers
5k views

Will I take acid damage if I used Ring of Water Walking to walk across a pool of acid?

Ring of Water Walking: While wearing this ring, you can stand on and move across any liquid surface as if it were solid ground. Water Walk (Spell, emphasis mine): This spell grants the ability ...
7
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1answer
883 views

Does an Illithid Elder Brain's brine pool have an effect on characters in contact or immersed in it?

What would happen if a character came in contact with or even became immersed in brine from an Illithid Elder Brain's brine pool?
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2answers
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Are there any methods to destroy Brown Mold besides cold damage?

The DMG p. 105 states Brown mold is immune to fire, and any source of fire brought within 5 feet of a patch causes it to instantly expand outward in the direction of the fire, covering a 10-foot-...
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1answer
302 views

Where are the rules for drowning or suffocation?

How does drowning/suffocation work in Chronicles of Darkness? I don't see rules for it in the core book.
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4answers
259 views

What are existing environmental rules for fighting on a raging river?

I want to set up a climatic battle for my players battling opponents on multiple rafts while everything rushes down a raging river. Has someone already set up environment rules that would cover this? ...
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4answers
6k views

Assuming your PCs can breathe underwater with a spell, what is the maximum depth they can go without assistance?

If a PC has a spell or item that allows them to breathe underwater, gives them gills, or whatever other means they might acquire to not drown, what is the maximum depth they could: Descend to before ...
6
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4answers
2k views

Could a spellcaster use a spell with the cold descriptor to form a bridge on top of lava?

I have a campaign coming up in which the adventurers will be traversing expanses on lava and I was wondering if a spellcaster could use a spell such as Sleet storm to create a bridge of ice on top of ...
1
vote
1answer
101 views

What sort of insulation and/or protection does the spell “Secure Shelter” offer?

What sort of protection against cold/heat does the spell secure shelter provide? I'm looking specifically at "Frostburn" and "Sandstorm" but "Frostburn" only gave me improvised shelter, not proper ...
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5answers
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How does drowning work when you're already at 0 hp and fall into water?

I had a player fighting against sahuagin by the shore the other day and he was dropped to 0 and dying. Because of his location, though, he landed in shallow water (2-3' deep) which I ruled was enough ...
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1answer
1k views

Does Thorn Whip cause damage indirectly if you pull enemies through damaging terrain? [duplicate]

You cannot generate attacks of opportunity with Thorn Whip. However there is a second level spell, Spike Growth, which inflicts 2d4 per 5ft of movement. So if Thorn Whip is used to pull an enemy 10ft ...
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5answers
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How to add a deep chasm-type hazard to an encounter without risk of instant death to PCs?

In fantasy works like Lord of the Rings, the vertical dimension often helps the protagonists in gravity-enhanced combat (in other words, pushing foes off high walls or into chasms to kill them). I ...
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1answer
2k views

Is a target pushed into a wall by a spell effect subject to collision damage?

Some spells can push the target X feet away (like thunderwave, which pushes 10 feet away on a failed save). I was wondering what happens if the target, while being pushed, encounters a wall or other ...
3
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1answer
263 views

What is the test for physical damage from cold weather / frostbite?

In Run & Gun, the consequences of being exposed to temperatures below freezing are described as follow: The risk of frostbite begins when a character is exposed to a Moderate or greater ...
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3answers
932 views

How could I quickly create or summon lots of water?

I am creating a npc malconvoker who would focus on summoning evil aquatic creatures. The idea gets even better, when you realise most opponents would have tons of problems with underwater environment. ...
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3answers
1k views

Are there rules for space exploration in D&D 3.5?

My 3 players of 18,19 and 20 level might explore the moon and other uninhabited planets of their solar system as a part of an ending act in my campaign. I couldn'f find any rules for differing gravity,...
6
votes
1answer
861 views

How can you raise temperatures to extreme levels

I'm looking for ways to raise the temperature of my surroundings. Wherever I go, water should evaporate, buffalo should drop dead and become nothing but skulls and the soil should become sand. I'm ...
3
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0answers
703 views

When does jumping down become falling, for damage purposes? [duplicate]

I understand that every 10 feet of distance fallen is 1d6 bludgeoning damage at the bottom... but how do you determine when to start calculating that if a player intentionally jumps down from a ledge? ...
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2answers
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What is your movement rate in lava?

Lets assume the character in question is immune to fire/suffocation/crushing damage from being immersed/wading in lava. What is their RAW movement rate? Is it just "difficult terrain" for wading? Is ...
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3answers
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How much damage does lava do?

How much damage does lava do? On contact? On submersion? I know being in hot temperatures for long periods of time invokes levels of exhaustion. But the DM's guide appears to neglect damage for ...
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2answers
9k views

Do dragons of all sizes get lair actions and regional effects?

In my campaign, a black dragon egg was lost by its mother and found by kobolds. Now the wyrmling is about three years old, holed up in a mine, and being worshipped by the ever-subservient kobolds. ...
11
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3answers
290 views

How harmful is an insidious atmosphere?

An insidious atmosphere "requires the use of protective suits or vacc suits" (inherited from corrosive atmospheres) and "will defeat any personal protective measures in 2 to 12 hours." (CT-TTB p.83, "...
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2answers
240 views

How can I run a crumbling ground hazard?

This is something I see in the movies that I want to use: People are running while the ground crumbles beneath their feet. Sometimes they need to stop, take a few steps back, and launch themselves ...
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4answers
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Can I use the Cap of Water Breathing or the Cloak of the Manta Ray to survive inside a Bag of Holding?

Bag of Holding: [...] Breathing creatures inside the bag can survive up to a number of minutes equal to 10 divided by the number of creatures (minimum 1 minute), after which time they begin to ...
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2answers
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How does fire work in D&D?

So my brother and his friend got the D&D starter set and wanted me to DM for them and their friends for the first time. With only an hour to learn the rules, it was hectic and chaotic. We probably ...
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1answer
611 views

Lightning Lure / Falling Damage Question [duplicate]

So I'm playing a Variant Tiefling from the SCAG, and I took the Winged trait. I also took the Lightning Lure cantrip, so that I could combine LL's 1d8 lightning damage with the 1d6 bludgeoning damage ...
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3answers
815 views

What are the Pathfinder environment rules for combat on the surface of the moon?

I run a Pathfinder campaign where the PCs will soon fight undead in outer space. Probably on the exposed surface of the moon, maybe outside a large creature flying between stars, perhaps somewhere ...
13
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4answers
53k views

How much damage does generic, non-magical fire do per round?

Say a character was in a burning house, the fire not caused by magical means, and had to pass through a hex of fire. What is the fire damage for this in 5e? What about per round?