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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8
votes
3answers
813 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 ...
5
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1answer
122 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 ...
29
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2answers
4k 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 ...
9
votes
2answers
194 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 ...
13
votes
1answer
806 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 ...
11
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2answers
384 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 ...
34
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3answers
6k 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 ...
9
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3answers
447 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 ...
2
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1answer
4k 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 ...
6
votes
2answers
216 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 ...
4
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2answers
2k 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 ...
5
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1answer
1k 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 ...
9
votes
1answer
249 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 ...
9
votes
2answers
854 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.
1
vote
2answers
677 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. ...
9
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3answers
2k views

Overland Flight underwater?

Can you use a fly speed underwater? How does the spell Overland Flight interact with underwater movement?
5
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1answer
400 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 ...
8
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2answers
2k views

How Do Combat Cantrips Function Under Water?

Underwater combat is never fun but for magic users it can be especially frustrating. Unless a character has Water Breathing or uses Alter Self they may find themselves in a situation where the DM ...
5
votes
2answers
784 views

What is the outcome of being under the effects of Freedom of Movement while underwater?

I know you don't take penalties to attack/damage with any type of weapon, but I'm actually looking at movement and the like. Are you able to swim freely, by choice? Do you ignore currents? Do you ...
8
votes
1answer
346 views

Can you use Wand of Wonder underwater?

Because you can't speak normally while underwater, you can't cast spells with verbal components. So you also can't activate magic items that require command words. (https://rpg.stackexchange.com/a/...
10
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2answers
1k views

Can you charge underwater if you have a swim speed?

Can a creature with a swim speed charge underwater? I know some creatures specifically state they can run underwater, etc. If a creature is bestowed a magical swim speed, can it treat water as ...
5
votes
1answer
295 views

Can I use acrobatics underwater to avoid AoOs?

My swashbuckling warblade might be fighting a dragon underwater. Can I use Acrobatics to avoid AoO while swimming underwater? Would there be a penalty, if allowed at all?
3
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1answer
92 views

Jump-themed maneuvers underwater

My swashbuckling human warblade just encountered what I presume to be a young dragon of indeterminate color while exploring an underwater cave. He has his trusty rapier on him, and he’s not afraid ...
9
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4answers
1k views

Can we explore under the sea using Leomund's Tiny Airlock?

Our group is 5th level: one wizard, one barbarian and and one warlock (old_one/tome). We got one ring of swimming only, and desperately need to find a sunken ship under the moonsea. The barb can swim ...
3
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2answers
187 views

How can I build an Underwater base?

I have a character who needs to hide some things, I could likely use some magical shenanigans but whats the fun in that when I could have a lair! Instead of going with the conventional cave or ...
4
votes
3answers
274 views

Does a heavy creature walking underwater require Swim checks?

Is it possible to walk on say the sandy floor of a shallow body of water instead of having to make swim checks? I ask as a DM with a new player starting and playing a warforged with adamantine body (-...
8
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2answers
2k views

Does throwing a net underwater have disadvantage?

I was looking at the rules for underwater combat, PHB 198, and noticed ...Even against a target within normal range, the attack has disadvantage unless the weapon is a crossbow, a net, or a weapon ...
14
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2answers
2k views

Can you cast the Produce Flame cantrip underwater?

Can you cast the produce flame cantrip underwater? All I could find on this subject was on p. 198 of the Player's Handbook: "Creatures and objects that are fully immersed in water have resistance to ...
4
votes
1answer
322 views

Can I activate the Legacy Weapon 'Flay' Underwater?

Flay is a whip from the book Weapons of Legacy. It has an ability called "Snake Sting (SP)": Snake Sting (Sp): Beginning at 5th level, three times per day, you can snap Flay to use magic missile as ...
4
votes
3answers
282 views

Can you take the run action underwater?

I have an underwater encounter coming up soon in my D&D 3.5e game. They will be entering a flooded section of dungeon. Rules say PCs can walk on the bottom, at half normal speed. (DMG, p. 92, ...
5
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2answers
2k views

How long can creatures with no swim speed travel in deep water before they die?

After answering this question about how deep can PCs go underwater, I started wondering how long can you keep swimming before you die. Here are the constraints: You can breathe underwater (ex, via ...
14
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4answers
7k 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 ...
13
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4answers
1k views

Does Life Bubble preclude the need to add legs to sharks?

In this answer, it is suggested that the spell Life Bubble would allow a shark to survive out of water, and that the 'tolerable living conditions' would include being underwater. Given that the spell ...
23
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4answers
5k views

How can characters know which weapons to use underwater?

My 5th Edition party is gearing up to take a short trip underwater. They found a friendly spellcaster to cast Waterbreathing on them and they're going to locate a giant octopus lair. In preparation, I'...
6
votes
2answers
1k views

Does fighting underwater impair natural attacks?

In a game I'm in we have ventured underwater into the ocean. I play a summoner, my eidolon has gills, a swim speed, a Bite, 2 claws, and a tentacle attack. How would being underwater effect his damage ...
132
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10answers
33k views

Can you drink a potion one-handed underwater?

I have a player who wants their PC to drink a potion underwater while one-handed, and as a DM I'm not sure how to rule it. Ask for a Dex check? What DC? Is it even possible? I couldn't find anything ...
3
votes
2answers
11k views

Options for breathing underwater [closed]

I'm taking the plunge (pun intended) and having a go at writing my own aquatic based adventure. I intend to use settings of a port, a ship, underwater and a hidden (air and water) cavern. I've ...
35
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4answers
24k views

Can spells with a verbal component be cast underwater if the caster can't breathe water?

My party recently tipped over a boat of enemies into what was essentially rapids and trapped the enemies in a cube of force underwater. The warriors inevitably drowned as they had no way out. However, ...
9
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2answers
30k views

How does combat work underwater?

I've been a 5e player for the last 6 months or so and soon I'll be DMing for the first time, as short filler when our main campaign can't go ahead (for example, our paladin is on holidays). My ...
10
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3answers
1k views

How does the Necklace of Adaption's bubble of air work out in practice underwater?

A recent question about the necklace of adaptation reminded me of an old question of my own that I've never been able to answer: Can a character wearing a necklace of adaption swim? It might seem a ...
6
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3answers
757 views

Does water pressure apply in D&D 4e [duplicate]

I plan on making an adventure, and in it they have to go deep underwater, through a tunnel, and out, but does water pressure apply in D&D 4e?
8
votes
3answers
488 views

Incorporating smell, taste, and weather underwater

Related to this question and this question. I am interested in building up the atmosphere of my aquatic campaign, and to do so, I would like to incorporate all the players' senses. But I am at a loss ...
13
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2answers
2k views

How do Energy Effects work underwater?

This is similar to this question on fire damage underwater but a little broader. How do other energy types work underwater? I'm plumbing through the underwater level of Castle Whiterock and my ...