Questions tagged [underwater]

For questions about underwater environments, an often noteworthy or special-case environment in RPGs that frequently involve special rules or modifications to rules.

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Can a petrified character drown?

At the end of our last gaming session my character was fighting a Gorgon in a pool of chest height water. I had the terrible misfortune of being knocked down and then petrified (turned to stone) Can I ...
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7 votes
3 answers
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Would a graviturgy wizard's adjust density feature trivialize kraken fights and water encounters?

It wouldn't work on a CR 23 Kraken (MM 193) per se due to the size restriction, but maybe something like a Juvenile Kraken (GoS 239) from Ghosts of Saltmarsh would be susceptible to it. The wording: ...
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5 votes
1 answer
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What are the conditions of an underwater environment?

Parallel to What are the conditions of a Zero-G environment?, Underwater environments are mentioned under Environmental Adaptation, but are otherwise undefined. Was this defined in an official book?
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12 votes
1 answer
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Best way to allow a warrior to use their slashing weapons underwater

Our party needs to go underwater. Our party also includes a warrior who is heavily specialized into a pair of +1 keen gold great scimitars, which deal slashing damage and thus take substantial ...
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18 votes
3 answers
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Are there any special rules governing invisibility underwater?

Are there any special rules for invisibility when underwater? For example, Pathfinder (a different game) has a rule that makes it easier to detect invisible creatures underwater due to the way they ...
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4 votes
1 answer
107 views

Can all Pokémon swim?

According to the core rules: Underwater Terrain is any water that a Pokémon or Trainer can be submerged in. You may not move through Underwater Terrain during battle if you do not have a Swim ...
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13 votes
2 answers
635 views

Can I get a long rest in Leomund's Tiny Hut if I'm underwater and water breathing?

I'm a druid/wizard and our party is trying to do some underwater spelunking. I cast the Water Breathing ritual, so we can all breathe underwater for 24 hours. After a few hours of adventuring we've ...
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17 votes
3 answers
528 views

How do aquatic races write underwater?

There are lots of situations where underwater races will want to send messages to each other, write in spell books, create maps, etc. Are there any examples out there in D&D lore (any edition, any ...
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10 votes
2 answers
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How do the Soulknife's psychic blades function in underwater combat?

Psychic Blades The Soulknife from Tasha's Cauldron of Everything gains the Psychic Blades feature at level 3. These are described as "shimmering blades of psychic energy . . . that you can ...
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19 votes
1 answer
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When casting the Control Water spell underwater, does the Part Water option create a cube of air?

The control water spell has the option to separate water and form a trench on a cubic area of up to 100 feet per side: Until the spell ends, you control any freestanding water inside an area you ...
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3 votes
1 answer
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How large is the whirlpool when a Nereid uses their Shape Water (Control Water) feature?

The nereid from The Hidden Shrine of Tamoachan has a special feature called "Shape Water" (not to be confused with the shape water cantrip), which does the following: Shape Water. The ...
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9 votes
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How does fighting underwater increase the encounter difficulty of combat?

I am in the process of designing an encounter in which a party of 8 level 3 players will fight a group of Chuul. The CR calculation shows that 3 Chuul will cause a hard encounter, but I intend that ...
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0 votes
1 answer
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How does underwater combat work with Soul Knives?

How does underwater combat work with Soul Knives'/Bolts'? Do they get the same penalties as regular weapons under water? Does a Soulbolt's Mind Bolt still have -2 per 5 feet ranged weapon penalties ...
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-3 votes
1 answer
413 views

What is every possible way a PC can breathe underwater?

Currently my group is planning an underwater strike on an underwater city. We are wondering what are all the possible ways we could get to breathe underwater. So far we have found: Cap of ...
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6 votes
2 answers
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Is this encounter in Ghosts of Saltmarsh ridiculously deadly?

In the Ghosts of Saltmarsh appendix A, "Of ships and the sea" one of the pre-created underwater locations (the wreck of the marshal) has the following feature: I'm hoping to run one of the ...
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6 votes
2 answers
493 views

Does a bronze dragon's wing attack work underwater?

An adult bronze dragon has a lair deep inside of a coastal mountain. To get to where she hides her stuff (and where she is keeping a clutch of eggs warm) an adventuring party needs to swim deep ...
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5 votes
1 answer
653 views

Storm Kings Thunder Maelstrom Mechanics

Currently running Storm King's Thunder, and my players just got the conch of teleportation. During the next session they will be using it. The module says that you take pressure damage for being at ...
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11 votes
5 answers
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What happens if a part of the ocean is zapped by the Witch Bolt spell?

From what I read, the witch bolt spell (PHB, p. 289) will only hit the target. But will it hit anything else - for example, a creature swimming within 10-15 feet of the strike location? The reason for ...
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10 votes
2 answers
1k views

Do crossbows and other noted exceptions miss past their long range underwater?

The rules is written as A ranged weapon attack automatically misses a target beyond the weapon’s normal range. Even against a target within normal range, the attack roll has disadvantage unless the ...
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2 votes
1 answer
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The whirlpool application of the Control Water spell leads to several questions regarding creatures caught in it

As written, the whirlpool usage of the control water spell says: Whirlpool. This effect requires a body of water at least 50 feet square and 25 feet deep. You cause a whirlpool to form in the center ...
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3 votes
2 answers
737 views

How does underwater rules work with flying familiars?

I will soon run the Underworld Speculation adventure with my group of players. Two of their characters have flying familiars (an owl and a pseudodragon). Is there something in the rules that states ...
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9 votes
2 answers
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Does drowning count as a condition?

So I know we are going to some kind of underwater place next session. I was wondering if the bard could use Lesser Restoration to "fix" the drowning "condition". That is, if it counts as one.
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4 votes
1 answer
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Can you use a Martial Discipline Stance from Path of War during underwater combat?

Can you use a Martial Discipline Stance from Path of War during underwater combat? Specifically Thrashing Dragon Stance: Outer Sphere Stance - When wielding two weapons, disciple inflicts an ...
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22 votes
4 answers
12k views

Is there anything that can create a fire that burns underwater?

Is there any fire-related item or spell in D&D 5e that can create a fire that can burn underwater?
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14 votes
1 answer
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Do the Gloves of Swimming and Climbing grant you a swimming speed?

The rules on Underwater Combat (PHB pg. 198) state: When making a melee weapon attack, a creature that doesn't have a swimming speed (either natural or granted by magic) has disadvantage on the ...
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7 votes
1 answer
180 views

How does the Battle Dancer Rolling Flurry work underwater?

The Brawler archetype Battle Dancer has the Rolling Flurry feature which states : When a battle dancer uses her brawler’s flurry, she must move 5 feet before each melee attack or combat maneuver. ...
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8 votes
5 answers
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Help with 3D combat

I recently asked this question, in which one of the comments mentioned there might be problems with 3D combat. My campaign will be nearly entirely underwater, in the deep sea where 3 dimensional ...
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3 votes
2 answers
780 views

Underwater Druidic Spellcasting

I've recently started building an underwater campaign, where most of the action will take place underwater. One of my players has brought to my attention the druidic spell list. They start at level 10,...
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9 votes
1 answer
673 views

Using Arcane Eye Under Water

I have a player who wants to know if they could use Arcane Eye above and below water (or any other liquids). I initially said yes, however, after reading the spell it says, “A solid barrier blocks ...
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7 votes
2 answers
1k views

Does using a crossbow with the Sharpshooter feat change its range in underwater combat?

The "Underwater Combat" section of the Combat chapter (PHB, p. 198) reads: A ranged weapon attack automatically misses a target beyond the weapon's normal range. Even against a target within normal ...
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9 votes
1 answer
2k views

Ruling for Grappling a Creature Underwater While you are on Land?

If a character is on the bank of a river and they want to reach into the water and grapple a creature in the water (assuming that they are within the size limit to be grappled) are there any special ...
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1 vote
1 answer
489 views

Is it possible to cast spells underwater if I am amphibious? [duplicate]

I am playing in a campaign where I am a water domain cleric water genasi. This means I am amphibious, and so I thought that I could cast spells underwater. When I tried to do this, the DM said you can'...
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20 votes
2 answers
8k views

Can you use the Fly spell to move underwater at a speed of 60 feet?

If under the effects of a Fly spell, can you move at a speed of 60 feet underwater?
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9 votes
3 answers
1k views

How powerful is a "Breathe Air" spell?

Land-dwelling druids can figure out a way to use magic in order to breathe underwater (, provided that they are able to cast 3rd-level spells). But what about druids that are already able to breathe ...
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6 votes
1 answer
1k views

What effect, if any, do water-creating spells have underwater?

There are a number of spells that produce their effects by conjuring and then manipulating large volumes of water, including Watery Sphere, Tidal Wave, and Tsunami. As far as I can tell, nothing stops ...
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30 votes
2 answers
6k views

Will this series of events work to drown the Tarrasque?

Here's the challenge: I, a level 17 Bard taught by the College of Compulsion (a homebrew subclass), am hired by some random bumpkins to go and get rid of the Tarrasque all by my lonesome, for 5 silver ...
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  • 329
9 votes
2 answers
1k views

Can a bard perform underwater?

We were underwater this past session and ran into an issue with the bard, who is a vocalist, and despite being able to breath underwater via the water breathing spell ran into an issue when we ...
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20 votes
4 answers
9k views

Are there rules for falling in water vs. diving vs. just jumping in for various depths of water?

Just realized that in DMing 5e I have unconsciously used a falling-in-water rule-of-thumb that I inherited from somewhere (maybe 2e or AD&D or maybe even Pathfinder). The ruling I've been using is ...
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  • 6,351
11 votes
2 answers
3k views

How do attacks with an underwater target and an attacker on land (and the reverse) work?

The Underwater Combat rules on attacking state: When making a melee weapon attack, a creature that doesn't have a swimming speed (either natural or granted by magic) has disadvantage on the attack ...
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35 votes
3 answers
7k views

Is it possible to rest underwater if you can breathe underwater?

I'm looking at the new Warlock eldritch invocations of XGTE, and the invocation Gift of the Depths gained my curiosity. The eldritch invocation Gift of the Depths states that you can breathe ...
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9 votes
3 answers
2k views

How to handle attacking a ship from underwater?

In a campaign I'm running, I have players who want to attack an enemy ship. Their current plan is to use Water Breathing and swim along the bottom of the body of water the ship is in to get under the ...
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8 votes
1 answer
32k views

What happens to lightning spells underwater?

As the old adage goes "water and electricity don't mix" because in real life water has impurities in it that make it super conductible. So what would happen in D&D if, for instance, a sorceress ...
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6 votes
2 answers
388 views

Would a Decanter of Endless Water propel a boat? [closed]

In Pathfinder this magical item was recently purchased by our party member. It says that it can put out of 5 gallons of water per second from a 1ft diameter circle. How would you go about ...
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2 votes
4 answers
5k views

Is your movement penalized underwater if you have a swimming speed but choose not to use it?

Here are the rules on underwater movement: While climbing or swimming, each foot of movement costs 1 extra foot (2 extra feet in difficult terrain), unless a creature has a climbing or swimming ...
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6 votes
1 answer
4k views

What happens if I cast Otiluke's Freezing Sphere while entirely submerged in water?

Otiluke's freezing sphere states: A frigid globe of cold energy streaks from your fingertips to a point of your choice within range, where it explodes in a 60-foot-radius sphere. Each creature ...
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10 votes
1 answer
855 views

Does a character start drowning if stunned underwater?

The title says it all; I'm just having trouble finding a definitive answer. I suspect someone who breathes normally would lose the ability to hold their breath when stunned. Sure, they would breathe ...
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  • 101
11 votes
2 answers
3k views

What happens when a character puts on a "Ring of Water Walking" while already underwater?

Got into an interesting conversation with a friend about this, and neither of us were quite sure as to what the actual effect of the ring would have on someone if they were already underwater.
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2 votes
2 answers
2k views

What happens after destroying water with Create or Destroy Water underwater?

The line of the spell in question says: You destroy up to 10 gallons of water in an open container within range. Range is 30 ft. I am on a raft. 20 ft below me (and to the north) is a shark. ...
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9 votes
3 answers
2k views

Overland Flight underwater?

Can you use a fly speed underwater? How does the spell Overland Flight interact with underwater movement?
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  • 8,560
5 votes
1 answer
1k views

Invisibility under water

How is invisibility treated underwater? Does the water move around them? Can they be located by displacement? Is there anything that modifies concealment? Does how thick or murky have any effect? What ...
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