A 4th level spell that can flood a battlefield, split a river like a certain prophet, or reach out and sink a ship from three hundred feet away.
Today we’re looking at a 4th level transmutation spell called Control Water. Available to Clerics, Druids, and Wizards, this is the spell that hands you a switch labeled “the ocean” and lets you flip it four different ways. You can raise the water, part the water, redirect the water, or spin it into a whirlpool, and you can change your mind every single turn for ten minutes. It’s a utility spell, a terrain spell, and a naval murder weapon all wearing the same stat block.
Sitting at a range of 300 feet, a casting time of one action, and a duration of concentration up to 10 minutes, Control Water works on any freestanding water inside a cube up to 100 feet on a side. That is a big cube. A hundred feet in every direction is enough to swallow a river crossing, a flooded dungeon room, a harbor, or most of a ship. And here’s the community angle that follows this spell everywhere it goes: the internet cannot stop arguing about whether it quietly deletes naval combat from the game. We’ll get to that fight, because it’s a good one.
The whole personality of this spell is options. Most spells do one thing. Control Water hands you a menu and lets you order something different off it each round without recasting. Let’s get into the rules, and remember, you can always fight me in the comments if you read it different.
RAW
- Casting Time: 1 action
- Range: 300 feet
- Components: V, S, M (a drop of water and a pinch of dust)
- Duration: Concentration, up to 10 minutes
Here’s the 2014 text, straight from the Player’s Handbook, page 227:
“Until the spell ends, you control any freestanding water inside an area you choose that is a cube up to 100 feet on a side. You can choose from any of the following effects when you cast this spell. As an action on your turn, you can repeat the same effect or choose a different one.”
Then it gives you four effects, and the whole spell is in the details of these four, so let’s walk them.
Flood. “You cause the water level of all standing water in the area to rise by as much as 20 feet. If the area includes a shore, the flooding water spills over onto dry land. If you choose an area in a large body of water, you instead create a 20-foot tall wave that travels from one side of the area to the other and then crashes down. Any Huge or smaller vehicles in the wave’s path are carried with it to the other side. Any Huge or smaller vehicles struck by the wave have a 25 percent chance of capsizing.” Read that carefully, because the capsize clause is the single most argued line in the spell. It only threatens Huge or smaller vehicles. A rowboat, a keelboat, a longship, sure. A full warship or a galleon is usually Gargantuan, which means the wave carries it but that flat 25 percent capsize does not touch it. People forget that constantly.
Part Water. “You cause water in the area to move apart and create a trench. The trench extends across the spell’s area, and the separated water forms a wall to either side.” This is the Red Sea button. A 100-foot-wide dry corridor with walls of water on both sides, held as long as you concentrate. When you drop it, the water fills back in over the next round. This is the mode that terrifies DMs, because a ship floating in the middle of a trench has some very awkward questions to answer about gravity.
Redirect Flow. “You cause flowing water in the area to move in a direction you choose, even if the water has to flow over obstacles, up walls, or in other unlikely directions.” Rivers run uphill on command. This one is pure utility and puzzle-solving, and it’s the mode nobody talks about, which is a shame, because rerouting a river is exactly the kind of thing that wins a siege or drains a moat.
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 of the area.” The vortex is 5 feet wide at the base, up to 50 feet wide at the top, and 25 feet tall. Anything within 25 feet gets pulled 10 feet toward it, and a creature that enters it makes a Strength save or takes 2d8 bludgeoning and, in the 2014 version, gets caught in it until the spell ends. This is your one built-in damage mode, and it’s less a nuke and more a drain that swallows swimmers and holds them under.
The most important sentence in the whole spell is the one right at the top: you can switch effects as an action on your turn. So you are not locked in. Part the water this round, flood it next round, spin a whirlpool the round after. One concentration, one slot, a rotating menu of water crimes.
At Higher Levels
Here’s a quick one that trips people up. Control Water has no “At Higher Levels” line. None. Casting it with a 5th, 6th, or 9th level slot does nothing extra. The cube stays 100 feet, the flood stays 20 feet, the whirlpool stays the same size. It’s a 4th level spell and it only ever wants a 4th level slot, so never burn a bigger one on it expecting a bigger wave. You won’t get one.
Limits and Cheeses
Two real limits before I send you to the companion post. First, it only works on freestanding water. Not the water inside a creature, not a potion in someone’s hand, not a Wall of Water someone else conjured unless your DM is feeling generous. Standing water and flowing water in the world, that’s the target. Second, it’s concentration, and this spell asks a lot of your concentration because the good plays want you holding it for multiple rounds while people are actively trying to hit you and break it. A caster on a rocking ship taking crossbow fire is not a safe place to park a ten-minute concentration spell.
The deep dive, the ship-sinking cheeses, the drop-concentration flood slam, the part-water trench tricks, and the whirlpool lockdown all live in the companion Control Water uses post, and that’s where the Reddit naval war really kicks off. Go read that one next.
The 2014 version versus the 2024 version
Control Water did get reprinted in the 2024 Player’s Handbook, on page 256, so there is a direct comparison to make, and the short version is that it’s almost the same spell. Same 4th level, same transmutation, same one action, same 300 feet, same 100-foot cube, same concentration up to 10 minutes, same four effects, and still no upcasting. If you know the 2014 spell you know the 2024 spell.
There are two changes worth naming. The first is tiny: the material component went from “a drop of water and a pinch of dust” to “a mixture of water and dust.” Same mud, cleaner sentence, zero mechanical difference. The second one actually matters a little, and it’s the Whirlpool. In 2014, a creature that failed its save got “caught in the vortex until the spell ends,” and had to fight out with disadvantage while objects took 2d8 every single round they stayed in. The 2024 rewrite trimmed all of that. Now you make the Strength save when you enter the whirlpool or end your turn in it, you take the 2d8 on a fail, and you can swim out by spending an action to pull away. The nasty “trapped until I let you go” clause is gone. So the 2024 whirlpool is a touch gentler, and the flood mode also quietly dropped the old line about water spilling over a shore onto dry land, though in practice DMs still rule the flood spills, because water does that.
So if someone says Control Water got reworked in 2024, they’re overselling it. The whirlpool got friendlier and the wording got tidier. Every world-bending flood and part-water play works exactly the same in both books.
History
Now the fun part, because this spell is old, and it used to have a completely different name. What we call Control Water only exists under that name starting in 3rd edition. Before that, it was two spells: Lower Water and its reverse, Raise Water.
In Advanced Dungeons and Dragons 1st edition, the 1978 Player’s Handbook, Lower Water was a 4th level cleric spell, and here’s the correction I want to make up front, because the “classic cleric and druid spell” line gets repeated a lot: in 1e it was cleric only. Druids did not get it. That comes later. The 1e version dropped the water depth by 5 percent of its original depth per caster level, so a 10th level cleric lowered it by half. The area was a square with sides of 10 feet per level, and it lasted one turn per level, a turn being 10 minutes. Flip it to Raise Water and you pushed the water up instead. Very tabletop-wargame math, all percentages and per-level scaling.
2nd edition in 1989 kept it as a priest spell, 4th level, in the Elemental Water sphere. It swapped the percentage for a flat rate: lower the water up to 2 feet per caster level, down to a minimum of an inch, and it acted like a Slow spell on water-based creatures. That 2-feet-per-level number is the one that carried forward. Range was 120 yards, still a square 10 feet per level on a side, still a turn per level.
3rd edition and 3.5 are where it becomes the spell you’d recognize. It got the unified name Control Water, folding raise and lower into one spell, and for the first time it opened up to Druids and to Wizards and Sorcerers, plus the Water domain. It went to Long range, 400 feet plus 40 per level, a duration of 10 minutes per level, and it still did the 2-feet-per-level lower or raise. Crucially, this is the edition that spelled out the naval nightmare in the text: lowering very large, deep water could form a whirlpool that swept up and trapped ships. The ship-sinking reputation this spell carries today was written into 3.5 on purpose.
4th edition is a blank. As far as I can find, there was no Control Water spell or ritual in 4e. If you know of one, correct me in the comments, but I came up empty, and 4e reworked so much of the magic system that a lot of old utility spells just did not make the jump.
And then 5th edition, in the 2014 Player’s Handbook, reinvented it into the four-mode concentration spell we have now. Gone is the per-level scaling and the raise-or-lower framing. In its place: a fixed 100-foot cube, a switchable menu of Flood, Part Water, Redirect Flow, and Whirlpool, and a 10-minute concentration timer. The 2024 version, as we covered, left that design alone and just softened the whirlpool. So the arc is a spell that spent two editions as fussy per-level water-depth math, became the official ship-wrecker in 3.5, skipped a generation in 4e, and came back in 5e as a flexible four-button toolkit.
Opinion
Control Water is one of the most DM-dependent spells in the entire game, and I mean that as a compliment and a warning at the same time. On a dry dungeon crawl it can sit unused for six sessions. Put the party on a boat, near a river, in a flooded ruin, or in a coastal city, and it suddenly becomes the most powerful thing anyone at the table can do. It is a spell that rewards you for reading the room, or in this case, reading the water table.
The naval reputation is earned but overblown. Yes, a clever caster can do horrifying things to a ship, and the drop-concentration flood slam is a real and mean trick. But the text has more brakes on it than the doomsayers admit. The capsize clause only bites Huge and smaller vehicles, the Part Water reading that most of the community lands on has the ship drifting with the water rather than hanging in the air like a cartoon, and 300 feet is short range for a sea battle. It’s strong, situational, and a genuinely fun problem to hand a DM, rather than an instant win button.
So I want to hear it. Have you ever sunk a ship with this thing, and did your DM let you, or did they invent enchanted keels and anti-magic hulls on the spot to stop you? Drop it in the comments below, go read the companion post for every flood, trench, and whirlpool trick the internet has cooked up, and until next time, roll high and stay ridiculous.
