One word, no gestures, and the biggest dragon in the room suddenly can’t hit you.
Today we’re looking at a 1st level necromancy spell called Cause Fear. Available to Warlocks and Wizards, this is the spell where you whisper a single word and remind something enormous that it is, in fact, mortal. It’s a single-target debuff that punches so far above its slot that most people don’t realize how good it is, and the reason is buried in one word, frightened.
Sitting at a range of 60 feet, a casting time of one action, and a duration of concentration up to one minute, Cause Fear does not deal a single point of damage. What it does is make one creature afraid of you, specifically you, for the whole fight if you can hold it. And here’s the wild part that separates it from every fear effect that came before. There is no size limit, no hit dice cap, nothing. You can Cause Fear on a pit fiend. You can Cause Fear on an ancient dragon. As long as it isn’t a construct or an undead, it can be made to fear a level one caster, and that’s the wildest part, as we’ll see when we get to the history.
The whole personality of this spell is efficiency. One verbal component, no hands needed, one target, one save, and if it sticks, that target spends the fight rolling worse and unable to come at you. 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: 60 feet
- Components: V
- Duration: Concentration, up to 1 minute
Here’s the text, straight from Xanathar’s Guide to Everything, page 151:
“You awaken the sense of mortality in one creature you can see within range. A construct or an undead is immune to this effect. The target must succeed on a Wisdom saving throw or become frightened of you until the spell ends. The frightened target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.”
Let’s take this apart, because the value is all in the details.
“You awaken the sense of mortality in one creature you can see within range.” Single target, and you have to be able to see it. Sixty feet is a comfortable range for a caster hanging back. Notice it just says one creature, no restriction on how big or how tough, which is the whole point.
“A construct or an undead is immune to this effect.” Here’s your one real limit, and it makes flavor sense. You can’t awaken a sense of mortality in a thing that was never alive or is already dead. Golems, animated armor, skeletons, zombies, liches, all immune. Everything else, from a goblin to a tarrasque, is fair game.
“The target must succeed on a Wisdom saving throw or become frightened of you until the spell ends.” This is a Wisdom save, which is worth knowing because a lot of big dumb bruisers have bad Wisdom. And the effect is the frightened condition, keyed specifically to you. Now, frightened is the part people undersell, so let me spell out exactly what it does. A frightened creature has disadvantage on attack rolls and ability checks the entire time it can see the thing it’s afraid of, and it can’t willingly move closer to that thing. So the boss you frightened is now swinging at your fighter with disadvantage on every single attack, and it cannot advance on your squishy back line. That is a monstrous effect to hang on a first-level slot, and it doesn’t care how many hit points the target has.
“The frightened target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.” Here’s the tax. It’s concentration, and the target gets a fresh save every turn. So against something with a good Wisdom save you might get one round out of it before it shrugs free. Against something with a bad one, you can ride that disadvantage for the whole minute. Cause Fear is a gamble that pays out big against the right target and fizzles against the wrong one, and knowing which is which is the skill of the spell.
At Higher Levels. “When you cast this spell using a spell slot of 2nd level or higher, you can target one additional creature for each slot level above 1st. The creatures must be within 30 feet of each other when you target them.” So a 2nd level slot frightens two, a 3rd frightens three, as long as they’re clustered. You’re still concentrating on all of them at once, and they each save independently, but upcasting turns a single-target lockdown into a group debuff.
Limits and Cheeses
Quick version, the deep dive is the companion post.
The line-of-sight clause is the hidden rule. Frightened only imposes disadvantage while the creature can see the source of its fear, which is you. Break line of sight, duck behind a wall, and the disadvantage switches off even though the condition is still running. So Cause Fear wants you visible and at range, which is a strange thing to want as a squishy caster, and it’s the main tension in playing it well.
The Wisdom save and the repeat-every-turn save are the two things that can let you down. Pick low-Wisdom targets and you’re golden. Pick a wise old dragon and you’re spending concentration on a coin flip.
And the verbal-only casting is the quiet superpower. No somatic, no material. You need nothing in your hands and no components at all, just your voice. That opens a specific and very sneaky door that I get into hard in the uses post.
I’m keeping this short here, because the real uses, the metamagic tricks, the lockdown combos, and the meanest ways to use this thing all live in the companion Cause Fear uses post. This one is about what it is and where it came from. And this spell has a real history, which is more than I can say for some of the newer ones.
Is there a 2024 version?
Short answer, no, and it’s the same story as a few other Xanathar’s spells. Cause Fear did not get reprinted in the 2024 Player’s Handbook. The only fear spell in that book is the bigger 3rd level one just called Fear. So there’s no updated 2024 Cause Fear to compare against. You’re casting the Xanathar’s version, unchanged, and it works fine under the 2024 rules, where the frightened condition does the same two things it always did, disadvantage while it can see you and no moving closer.
So if anyone tells you Cause Fear changed in 2024, it didn’t, because it wasn’t in the book to change. Now the part with actual history.
History
Here’s where Cause Fear gets interesting, because unlike a lot of the Xanathar’s spells, this one isn’t new at all. The name goes back decades, and the spell has quietly gotten stronger every time it’s appeared, which is the opposite of what usually happens.
Back in Advanced Dungeons and Dragons, there wasn’t a standalone Cause Fear spell on its own. It existed as the reverse of a cleric spell called Remove Fear. Remove Fear rallied your allies and shored up their saves against fear. Flip it, and you got Cause Fear, which forced a single target to save or flee in blind panic, running away from you at full speed for 1d4 rounds. That’s the original. It didn’t debuff anything, it just made one enemy turn tail and run. There was also a wizard-side cousin called Scare that did something similar to weaker creatures. So from the very beginning, the idea was locked in, one target, a fear save, and they’re out of the fight for a few rounds.
Then in 3rd edition and 3.5, Cause Fear graduated into a proper spell on its own, a 1st level necromancy available to bards, clerics, and wizards. And this is the version worth really understanding, because it shows you how far the spell has come. In 3.5, Cause Fear could only affect a living creature with 5 or fewer hit dice. Five or fewer. Anything with 6 hit dice or more was flat immune, no save required. On top of that, even when it worked, it lasted only 1d4 rounds, and if the target made its save it was merely shaken for a single round instead. It was a spell for scaring the weenies. Any real threat just ignored it completely. It also still carried its old identity, it counters and dispels Remove Fear, that reversible pairing hanging on from the AD&D days.
Fourth edition did what it did to everything and folded fear into the big power-and-keyword system, so there wasn’t a discrete Cause Fear spell to speak of during that era.
And then 5th edition, in Xanathar’s Guide to Everything in 2017, brought it back and quietly made it enormous. Look at what changed. That hit dice cap, the thing that made old Cause Fear useless against anything scary? Gone. Completely gone. The 5e version works on anything that isn’t a construct or an undead, which means for the first time in the spell’s entire history, you can Cause Fear on the biggest, meanest monster at the table. The duration went from a few rounds to a full minute of concentration. And the effect matured from “run away” into the modern frightened condition, disadvantage on attacks and no advancing, which is honestly more useful against a boss than making it flee.
So that’s the arc, and it’s a good one. Cause Fear started as a spell that chased off small fry for a couple of rounds, spent third edition explicitly unable to touch anything with more than five hit dice, and then in fifth edition threw the cap in the trash and became a spell whose entire pitch is that it works on the scariest thing in the room. It went from bully-the-weak to humble-the-mighty. Not many spells improve that dramatically across editions, and Cause Fear did it while keeping the exact same name it’s had since the beginning.
Opinion
Cause Fear is one of the most slept-on first-level spells in the game, and it’s slept on for a dumb reason, it doesn’t deal damage, so new players skip right past it. But think about what disadvantage on every attack actually does over a full minute against a boss. You’re cutting a dragon’s damage output roughly in half for the whole fight, from a first-level slot, while also pinning it in place so it can’t get to your wizard. The good Wisdom saves on high-end monsters keep it honest, and the concentration and line-of-sight requirements ask something of you, but when it lands on the right target it is one of the best returns on a first-level slot in the entire game.
It’s a control spell wearing a damage spell’s disappointing first impression, and the players who figure that out get a lot of mileage out of one whispered word.
So I want to hear it. Is Cause Fear a staple on your warlock or wizard, or does the every-turn save make it too unreliable for your table? And what’s the biggest, scariest thing you’ve ever made turn tail? Let me know in the comments below, go read the companion post for all the ways to weaponize it, and until next time, roll high and stay ridiculous.
