Duergar Race Guide: D&D 5e (2014)

Introduction

Duergar are gray dwarves of the Underdark, introduced as a playable dwarf subrace in Mordenkainen's Tome of Foes. You pick duergar where you would pick Hill Dwarf or Mountain Dwarf, and keep every base dwarf trait, then add their own ability score increase, their own defensive package, and two innate spells that no other dwarf gets access to. Mechanically and narratively, Duergar trace back to the same stock as surface dwarves, enslaved by mind flayers until the warrior Laduguer, later their god, led them to freedom. That history shows up directly in the trait list. Advantage against illusions, charm, and paralysis reads as a scar left by illithid domination, and the book says the mind flayers' experiments are what gave every duergar the psionic talent behind Duergar Magic.

The build case is straightforward. A Duergar carries the full base dwarf package (Constitution +2, Darkvision, Dwarven Resilience against poison, weapon and tool proficiencies, Stonecunning) and adds Strength +1, superior 120-foot darkvision, Undercommon, advantage on saves against illusions/charm/paralysis, two free castings of enlarge and invisibility, and Sunlight Sensitivity. That is a Strength-and-Constitution martial stat line wrapped around a useful utility-spell kit, with one notable tradeoff attached: you take a mechanical penalty in direct sunlight, and you cannot even cast your racial spells while standing in it.

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Duergar Culture: A Dark Mirror of the Dwarven Clan

Duergar society runs on three principles set down by Laduguer and enforced by Deep Duerra: our pockets are never full, our fight is never done, and our resolve is never shaken. Ambition and greed never rest: no amount of treasure or status is ever enough, and success is never a cause for celebration. The fight never ends: the weak aren't fit to keep what they have, and Deep Duerra's priests are especially eager to destroy dwarf communities. Resolve never wavers: any show of weakness is a mortal sin. Laduguer's teachings oppose everything Moradin represents, which gives a duergar adventurer beside a surface dwarf built-in friction, and trusting companions or sharing treasure openly runs against that upbringing.

That backstory is also why Duergar and Dwarf read as opposites built from the same trait chassis. Both races share Constitution +2, Darkvision, Dwarven Resilience against poison, the same weapon and tool proficiencies, and Stonecunning. The mechanical skeleton is identical. What diverges is everything layered on top: a surface Hill or Mountain Dwarf gets a second ability score bump (Wisdom or Strength) and a straightforward, no-tradeoff kit, while a Duergar trades that flexibility for a narrower Strength-only bonus, a stronger but sunlight-gated spell package, and a mechanical drawback the base races never have to think about. Mechanically, Duergar is the higher-ceiling, higher-maintenance version of the same dwarven foundation. Pick it when the campaign supports the tradeoff, and default to Hill or Mountain Dwarf when it doesn't.

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Disclaimer

Ratings use a four-color system reflecting overall power in the context of the 2014 rules:

• ● Red - Poor. Avoid or situational at best.
• ● Orange - Situational. Useful in specific builds or campaigns.
• ● Green - Good. Reliable value in most builds.
• ● Blue - Excellent. Best-in-slot or near it for the right build.

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Racial Traits

Duergar have every trait listed under Dwarf in the Player's Handbook, plus the traits below layered on top. There are no further Duergar subraces; every gray dwarf character uses the same package.

● Ability Score Increase: Strength +1 (stacks with Dwarf's Constitution +2)

A Duergar's final stat line is Constitution +2, Strength +1: a Strength-primary martial spread with a Constitution cushion behind it. That combination lines up directly with Fighter, Barbarian, Paladin, and any Strength-based Ranger or Rogue build, and it is a dead stat for any Charisma- or Wisdom-primary caster.

● Superior Darkvision

Your darkvision extends to 120 feet instead of the standard 60 feet every other dwarf gets. In an Underdark campaign, which is Duergar's default home turf, this is a meaningful upgrade. It lets you spot ambushes, ledges, and hazards at a range most of the rest of the party simply cannot see, without needing a torch or a spell that would give your position away.

● Extra Language: Undercommon

Undercommon is the trade language of the Underdark's major factions. Drow, duergar, and a wide range of subterranean creatures all use it. Outside an Underdark-set campaign it is a low-impact pickup, but inside one it opens negotiation, interrogation, and information-gathering options that most surface-focused characters simply lack.

● Duergar Resilience

Advantage on saving throws against illusions and against being charmed or paralyzed. This is a direct answer to three of the most dangerous save-or-suffer effects a party can face: mind flayer domination and mind-affecting powers, ghoul and ghast paralysis, and the illusion magic drow and other Underdark casters lean on heavily. It is strongest exactly where the race is thematically most likely to see play, in a mind-flayer-adjacent or Underdark-heavy campaign, but the charm and paralysis half of the trait is broadly useful in any game.

● Duergar Magic

At 3rd level you can cast enlarge/reduce on yourself once, using only the enlarge option. At 5th level you can cast invisibility on yourself once. Both recharge on a long rest, need no material components, and use Intelligence as the spellcasting ability, though a self-only buff never uses a DC or attack roll. Both require concentration, so they can't run at the same time. Neither can be cast while you are standing in direct sunlight, although sunlight has no effect on either spell once it is already active.

This is the trait that defines the race's build identity, and it splits cleanly into two separate use cases. Enlarge makes you Large, adds 1d4 to every weapon damage roll and grants advantage on Strength checks and saving throws for up to a minute of concentration: a free, no-slot damage buff that costs your action to cast, so cast it before initiative when you can. Invisibility, by contrast, ends the moment you attack or cast any spell, so it functions as a scouting and infiltration tool rather than a combat opener. Slip past a guard, reposition without drawing opportunity attacks, or case a location before the rest of the party moves in. Treat them as two different tools for two different moments, not one combined "nova plus stealth" package.

● Sunlight Sensitivity

You have disadvantage on attack rolls and on Wisdom (Perception) checks that rely on sight when you, your target, or whatever you're trying to perceive is in direct sunlight. This is the race's one significant tax, and its size depends entirely on the campaign. In a surface-set game with regular daylight encounters, it is a recurring, table-relevant cost on both your offense and your passive awareness. In an Underdark campaign, a night-operations game, or a party that already avoids daytime fights as a matter of course, it barely comes up. Weigh this against Duergar Magic's identical sunlight restriction before committing. A Duergar built for a bright, surface-heavy campaign is fighting its own trait list twice over.

● Dwarven Resilience (base Dwarf trait)

Advantage on saving throws against poison, and resistance to poison damage. Combined with Duergar Resilience's illusion/charm/paralysis coverage, a Duergar has one of the widest saving-throw defense profiles of any race in the 2014 catalog.

● Dwarven Combat Training, Tool Proficiency, and Stonecunning (base Dwarf traits)

Proficiency with battleaxe, handaxe, light hammer, and warhammer; proficiency with one of smith's tools, brewer's supplies, or mason's tools; and double proficiency bonus on History checks related to stonework. See the full Dwarf Race Guide for a detailed breakdown of these shared traits. Every one of them carries over to Duergar unchanged.

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Ability Scores

Strength (+1): The race's headline martial stat. It is a small bonus on its own, but it pushes a point-buy or standard-array Strength score further toward the 20 cap earlier, and it stacks with every enlarge cast for a bigger Strength-check and Strength-save cushion during the buff's one-minute window.

Constitution (+2): Inherited from the base dwarf package and every bit as valuable here as it is on a surface dwarf: more hit points, better concentration saves, and a stronger Constitution save against poison and the ghoul paralysis an Underdark campaign throws at the party, and better concentration checks to keep enlarge running.

Neither ability score bonus touches Dexterity, Intelligence, Wisdom, or Charisma, so plan your point-buy or standard-array allocation with that gap in mind. A Duergar Fighter or Barbarian should push Dexterity only as far as armor and initiative require, since neither the race nor most Strength-based martial builds need it as a primary stat. Intelligence needs no investment at all: it's the spellcasting ability behind Duergar Magic, but both spells target only you, so no DC or attack roll ever uses it. Dump it freely.

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Where Duergar Fits in a Campaign

Sunlight Sensitivity and Duergar Magic's sunlight restriction both point toward the same practical answer: this race performs best in a campaign that spends a lot of time underground, at night, or in overcast conditions. An Underdark-based adventure is the obvious fit, since darkvision, Undercommon, and Duergar Resilience's illusion/charm/paralysis coverage all become table-relevant on nearly every session. A city-based intrigue campaign that runs mostly after dark works almost as well.

A surface-focused, daylight-heavy campaign is a harder sell, but not an automatic dealbreaker. A Duergar character in that kind of game can lean on party tactics instead of racial traits: fight from behind cover or an ally's shadow, favor ranged or reach weapons that don't need to close into direct light, and save the enlarge nova for a fight that starts indoors, at dusk, or underground rather than assuming it's always available. Talk to your DM about how often direct sunlight will actually matter in the specific campaign before ruling Duergar in or out. A dungeon-crawl-heavy game and a courtly daylight-politics game are functionally two different races' worth of value from the same trait list.

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Best Classes

● Fighter

The cleanest fit in the catalog. Strength and Constitution are Fighter's two most important stats, and Fighter has no class feature that competes with enlarge's concentration. Cast enlarge with your action, Action Surge, and attack in the same turn, with each hit carrying an extra 1d4. A Battle Master or Champion Duergar Fighter gets full value from every trait on the list except Sunlight Sensitivity.

● Barbarian

The stat line fits perfectly, but Duergar Magic does not. Rage says you can't cast spells or concentrate on them while raging, so entering a rage ends enlarge, and you can't cast it once the rage starts. A Duergar Barbarian gets the Strength, Constitution and Duergar Resilience, and uses enlarge only in fights where it chooses not to rage. Invisibility still works for scouting outside combat.

● Paladin

Strength and Constitution both matter for a Strength-based Paladin, and a Divine Smite nova already wants big weapon dice. Enlarge's extra 1d4 per hit stacks on top of Divine Smite, which is not a spell. It does compete for concentration with bless and the smite spells. Charisma gets no help from the racial bonuses, so this sits a tier below Fighter and Barbarian, but the durability and nova ceiling are both strong.

● Rogue

Rogue doesn't benefit from either ability score bonus directly, but the invisibility trait is one of the best infiltration tools any race offers a class that is already built around stealth and positioning. Pair it with Duergar Resilience's advantage against being charmed or paralyzed, both common status effects that shut down a Rogue's turn entirely, and you get a scout who is both hard to detect and hard to lock down once detected.

● Ranger

A Strength-based Ranger gets direct value from both ability score bonuses, and invisibility reinforces the class's existing scouting and ambush identity. Superior darkvision and Undercommon are both practically useful for a Ranger operating in Underdark terrain, which is exactly the setting Duergar is built around.

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Worst Classes

● Sorcerer

Charisma-primary, and neither racial ability bonus touches Charisma. Enlarge and invisibility are still usable as free utility spells, but you're getting zero mileage from the stat line itself, and Sunlight Sensitivity is a meaningful cost for a class that wants to see its targets clearly to land concentration-heavy spells.

● Bard

Charisma-primary again, with the same wasted-stat problem as Sorcerer. Bard also tends to want a visible, front-facing social role in daylight towns and courts, which is precisely where Sunlight Sensitivity bites hardest.

● Druid

Wisdom-primary, and Duergar offers no Wisdom bonus at all. The race's Underdark, stronghold, and forge-industry flavor also sits at odds with Druid's nature-focused identity. Playable, but you are working against both the mechanics and the theme at once.

● Cleric

Wisdom-primary again, with the same wasted-bonus problem as Druid. Duergar do worship two gods of their own, Deep Duerra and Laduguer, so a Duergar Cleric is thematically coherent, but the ability score spread does nothing to support the build. You're playing this pairing for flavor, not mechanical benefit.

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Best Feats

● Great Weapon Master

A Strength-primary martial build with a free once-per-rest damage buff is exactly the profile this feat wants. Stack the feat's -5/+10 power-attack option on a turn where enlarge is already active, and a Duergar Fighter or Barbarian produces some of the highest single-round damage available to a Strength build in the 2014 catalog.

● Sentinel

Reinforces the front-line, tanky identity the Constitution +2 and Strength +1 spread already points toward. Locking enemies in melee range pairs naturally with a Fighter or Paladin who wants to hold a line rather than chase targets around the battlefield.

● Tough

Extra hit points compound on top of an already Constitution-heavy racial bonus, and durability is the throughline of everything else Duergar brings to the table: poison resistance, illusion/charm/paralysis advantage, and a Constitution-friendly stat line all point the same direction.

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Multiclassing Considerations

Fighter + Barbarian: Both classes want the same two ability scores, and a short dip into either grants Action Surge or Rage. Remember that raging turns enlarge off, so choose each fight between Rage and the enlarge buff.

Rogue + Ranger: A Strength- or Dexterity-based skirmisher combination that leans fully into invisibility, superior darkvision, and Undercommon for an Underdark-scouting identity. Neither class needs the racial ability bonuses to feel strong, since both bring their own scaling damage (Sneak Attack, Hunter's Mark) independent of raw Strength. Hunter's Mark and invisibility both need concentration, so plan which one runs.

Fighter + Rogue: A short two- or three-level Rogue dip on top of a Fighter chassis picks up Expertise and Sneak Attack without giving up Extra Attack for long, and it lets a single character use both halves of Duergar Magic the way they're each meant to be used: enlarge to open a fight in melee, invisibility to reposition or scout between engagements. This spreads the race's full trait list across one character instead of leaving half of it unused.

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Example Build: Duergar Fighter (Levels 1-10)

Race: Duergar (+1 STR, +2 CON) | Class: Fighter (Champion) | Background: Soldier

Starting Stats (Point Buy, 27 points): STR 15 (+1=16), DEX 10, CON 15 (+2=17), INT 8, WIS 14, CHA 8

Key Tactics:

• Open a planned fight with enlarge before initiative if you can (it lasts a full minute), then use Action Surge for a second full Attack action inside that window. Every hit carries the extra 1d4 on top of Great Weapon Master's +10.
• Save invisibility for scouting a duergar stronghold, slipping past a guard patrol, or repositioning out of a bad spot mid-dungeon rather than as a combat opener, since it drops the instant you attack.
• Track direct sunlight explicitly in any surface-set arc of the campaign. Both Duergar Magic spells are unusable in it, and your attack rolls take disadvantage in it as well.

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FAQ

Is Duergar a subrace of Dwarf in D&D 5e 2014?

Yes. Mordenkainen's Tome of Foes presents duergar as a dwarf subrace, chosen in place of Hill Dwarf or Mountain Dwarf. It carries every base dwarf trait plus its own additional package.

What level do Duergar get their enlarge and invisibility spells?

Enlarge unlocks at 3rd character level, usable once per long rest. Invisibility unlocks at 5th character level, also once per long rest. Neither needs material components, both require concentration, and Intelligence is the spellcasting ability for both.

Can Duergar cast their racial spells in sunlight?

No. Duergar Magic cannot be cast while you're in direct sunlight, though sunlight has no effect on the spell once it's already active. Combined with Sunlight Sensitivity's attack and Perception penalty, Duergar is a race that actively wants an Underdark, night-operations, or heavily overcast campaign.

Is Sunlight Sensitivity a dealbreaker for Duergar?

It depends on the campaign. A surface-set game with frequent daylight combat makes the penalty a recurring cost. An Underdark-based campaign or a party that already avoids daytime fights turns it into a non-issue, which is exactly the kind of MToF-flavored campaign Duergar is designed for.

What is the best class for a Duergar character?

Fighter gets the most value: it wants Strength and Constitution, and nothing in the class competes with enlarge's concentration. Barbarian wants the same stats, but Rage ends enlarge. Rogue is a strong secondary pick for the invisibility trait's scouting value alone.

How is Duergar different from playing a regular Dwarf?

Both share the same core dwarf traits (Constitution +2, Darkvision, poison resistance, weapon/tool proficiencies, and Stonecunning), but Duergar swaps out the second ability score bump (Wisdom for Hill Dwarf, Strength +2 and armor training for Mountain Dwarf) for a smaller Strength +1, superior 120-foot darkvision, Undercommon, advantage on saves against illusions, charm and paralysis, two innate spells, and Sunlight Sensitivity. It's a higher-ceiling, higher-maintenance version of the same dwarven foundation, best suited to a campaign that can support the sunlight tradeoff.

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Final Notes

Hot Take: Duergar is a Fighter race that most guides sell as a Barbarian race. The stat line reads like it was written for Rage, but Rage stops you from casting or concentrating on spells, and enlarge is a concentration spell. Rage first and you can't cast it; cast it first and the rage ends it. A Barbarian ends up choosing each fight between two damage buffs that should stack. A Fighter has no such conflict: cast enlarge before the door opens, keep concentration with a 17 Constitution, and every hit for the next minute deals an extra 1d4.

Duergar rewards a Strength-and-Constitution martial build that can tolerate, or actively wants, an Underdark or low-light campaign. The stat line and Duergar Resilience line up cleanly with Fighter and Barbarian, enlarge gives a Fighter a once-per-rest damage spike (a Barbarian has to skip Rage to use it), and invisibility extends the race's usefulness into scouting and infiltration for a Rogue or Ranger who wants it.

If your table spends significant time in the Underdark, or your DM's campaign leans into Mordenkainen's Tome of Foes' mind-flayer-adjacent lore, Duergar is one of the most thematically and mechanically coherent race choices available in the 2014 catalog.