Tiefling Barbarian Build Guide

Levels 1-4

Start with a stat spread of STR 15, DEX 13, CON 14. Use Tasha's rules to apply a +2 to Strength (starting at 17) and +1 to Dexterity (starting at 14). At level 1, your primary goal is to buy Scale Mail, and eventually Half-Plate, because your Unarmored Defense is too low to rely on. At level 3, select the Path of the Zealot. Divine Fury adds 1d6 + half your Barbarian level in necrotic or radiant damage to your first hit on your turn, cementing your Striker role. At level 4, take the Great Weapon Master feat. You will use Reckless Attack every turn to offset the -5 attack penalty, generating massive damage spikes.

Levels 5-10

Level 5 brings Extra Attack and Fast Movement. Your baseline DPR jumps significantly when you swing a heavy weapon twice with GWM. At level 6, Zealots get Fanatical Focus, allowing you to reroll a failed saving throw while raging. This is critical for surviving Hold Person or Charm Person spells. At level 8, take a half-feat like Slasher or Heavy Armor Master (if you multiclassed for heavy armor) to round your Strength to 18, or simply take an Ability Score Improvement for +2 Strength.

Levels 11-16

Level 11 gives you Relentless Rage, allowing you to shrug off lethal blows with a DC 10 Constitution save. Combined with your Zealot feature Rage Beyond Death at level 14, you literally cannot die from hit point loss while your rage persists. At level 12, max your Strength to 20. At level 16, you desperately need the Resilient (Wisdom) feat. High-level monsters will target your mental stats with effects like Dominate Person, and failing those saves turns you into a lethal threat to your own party.

Levels 17-20

Levels 17 through 20 are where you reap the rewards of staying a pure Barbarian. Brutal Critical adds an extra damage die, though it's mathematically underwhelming compared to consistent GWM swings. The real prize is the level 20 capstone, Primal Champion. Bumping your Strength and Constitution by 4 points pushes your Strength to 24 (a +7 modifier), giving you unparalleled accuracy and damage on every single melee attack, while boosting your hit points beyond 200.

Great Weapon Master

Take this at level 4. The Tiefling Barbarian's job is to deal damage, and taking a -5 to hit for +10 damage is the most efficient way to do it. Because you have Reckless Attack at level 2, you grant yourself advantage on demand, mathematically canceling out the -5 penalty against most level-appropriate ACs.

Infernal Constitution

An exclusive racial feat for Tieflings from Xanathar's Guide to Everything. This gives you +1 Constitution, resistance to cold and poison damage, and advantage on saving throws against being poisoned. Combined with your innate Fire resistance and Rage's physical resistances, you effectively become a Bear Totem Barbarian while still getting to play a high-DPR Zealot.

Resilient (Wisdom)

Take this by level 16 at the latest. Barbarians naturally struggle with Wisdom saves. As a Tiefling, your Fiendish Legacy doesn't protect your mind. Adding your proficiency bonus to Wisdom saving throws is mandatory in Tier 3 and 4 play to avoid being paralyzed or mind-controlled.

Tier 1 (Levels 1-4)

Prioritize defensive upgrades early. Sell your starting gear to acquire Scale Mail, and upgrade to Half-Plate as soon as you have 750 gold. With 14 Dexterity, Half-Plate gives you 17 AC, far outpacing your Unarmored Defense. Wield a Glaive or Greatsword.

Tier 2 (Levels 5-10)

Seek out a +1 Heavy Weapon to offset the Great Weapon Master penalty. A Cloak of Protection is vital to boost your saving throws, particularly your weak Wisdom and Intelligence saves.

Tier 3 (Levels 11-16)

Your primary goal is a Belt of Fire Giant Strength (setting STR to 25) or a Flametongue Greatsword. The Flametongue synergizes brilliantly with your built-in fire resistance if you ever face enemies with fire-reflection abilities, and drastically increases your critical hit damage.

Tier 4 (Levels 17-20)

Acquire a Blood Fury Tattoo from Tasha's Cauldron. It grants extra necrotic damage and healing on hits, stacking beautifully with Zealot's Divine Fury. A Belt of Storm Giant Strength (STR 29) is the ultimate prize if your DM hands out legendary items.

As a Tiefling Barbarian, your party role is the frontline Striker. You are the anvil against which the party breaks the enemy. Your innate fire resistance makes you an excellent partner for an Evocation Wizard; they can drop a Fireball directly on top of you, and between your resistance and Danger Sense, you will take little to zero damage.

You pair exceptionally well with a Twilight Domain Cleric or a College of Glamour Bard. You lack innate healing and are vulnerable to mental crowd control. A Twilight Cleric's Twilight Sanctuary gives you temporary hit points every turn, effectively doubling their value due to your Rage resistances, while a Bard's Heroism spell can make you immune to the Frightened condition, which otherwise shuts down your ability to approach enemies.

Fighter 2 to 4 Dip

Taking levels in Fighter is highly optimal. A 2-level dip gets you the Great Weapon Fighting style and Action Surge, allowing for explosive burst turns where you attack four times with GWM. Pushing to Fighter 3 for the Battle Master archetype gives you Precision Attack maneuvers to turn near-misses with GWM into hits. Fighter 4 nets you an Ability Score Improvement, ensuring you don't fall behind on feats.

Peace Domain Cleric 1 Dip

While you cannot cast spells while raging, Emboldening Bond is not a spell. A 1-level dip into Peace Cleric lets you set up Emboldening Bond before combat, giving you and your allies a 1d4 bonus to attacks and saving throws. This 1d4 stacks with your Reckless Attack advantage, making GWM swings nearly impossible to miss.

• Casting Hellish Rebuke while Raging: Many players forget that Tiefling racial spells follow the normal spellcasting rules. If you are Raging, you cannot use your reaction to cast Hellish Rebuke.
• Choosing Path of the Totem Warrior (Bear): Bear Totem grants resistance to all damage except psychic. Taking this completely invalidates your Tiefling's innate Fire resistance, rendering your primary racial trait useless.
• Relying on Unarmored Defense: With optimal stats of 15 STR, 13 DEX, and 14 CON, your Unarmored Defense AC is only 13. Wearing medium armor (Half-Plate) provides an AC of 17. Don't fall into the trap of fighting naked.
• Picking a spellcasting subrace: Variants like the Zariel Tiefling offer Searing Smite. Smites granted by racial traits require concentration, which immediately drops the moment you enter your Rage. Stick to the base Tiefling or the Winged Tiefling variant.