Dwarf Fiend Patron Warlock Build Guide

Levels 1-4

Start with Eldritch Blast and Hex. You need reliable damage right away. At level 3, the Fiend Patron comes online, granting Dark One's Blessing and expanding your spell list. Take Scorching Ray immediately; it's a fantastic scaling damage option that forces multiple concentration checks on casters. For your Pact Boon, Pact of the Tome gives you utility cantrips like Guidance, while Pact of the Chain gives you an Imp familiar to scout in magical darkness. At level 4, take the Fey Touched feat to bump your Charisma from 15 to 16, grabbing Misty Step and Command—which scales beautifully with Warlock slots.

Levels 5-10

Level 5 is the massive power spike: you get Fireball. With two 3rd-level spell slots recharging on a short rest, you become a premier AoE blaster. Level 6 grants Dark One's Own Luck. Save this 1d10 specifically for concentration checks on Hex or Wall of Fire, or to pass devastating saving throws. At level 8, take your ASI to push Charisma to 18. At level 10, Fiendish Resilience allows you to choose a damage resistance on a short rest. Default to Fire or Poison, though Dwarven Resilience already gives you advantage on poison saves, making Fire the optimal choice for generic dungeon delving.

Levels 11-16

Level 11 unlocks your 6th-level Mystic Arcanum. Take Mass Suggestion to neutralize half an encounter without concentration. At level 12, max your Charisma to 20. Level 14 unlocks your capstone: Hurl Through Hell. When you hit a creature with an attack (like an Eldritch Blast beam), you banish them and deal 10d10 psychic damage. Use this to instantly remove a boss's lieutenant from the field for a round while melting their health. At level 16, take Resilient (Constitution) to bump your 13 CON to 14 and solidify your concentration saves.

Levels 17-20

Level 17 brings your 9th-level Mystic Arcanum; Foresight is incredible for advantage on all your Eldritch Blast rolls and enemy disadvantage against your AC. At level 19, take Elemental Adept (Fire). By this tier, many enemies resist fire damage, and this feat ensures your Fireball and Wall of Fire remain relevant against high-CR threats. Your Dark One's Blessing is now granting a massive 25 THP per kill.

Cantrips

Eldritch Blast is mandatory; combined with Agonizing Blast, it's your baseline damage. Grab Mind Sliver to penalize an enemy's saving throw by 1d4 right before you or an ally drops a high-level control spell.

Level 1-2 Spells

Hex is your bread-and-butter for single-target DPR in Tier 1. Command (from the Fiend list) is incredible because it upcasts perfectly; a 5th-level slot commands five targets to grovel, wasting their turns and giving your melee allies advantage.

Level 3-5 Spells

Fireball is non-negotiable. Wall of Fire (level 7) is premier battlefield control, trapping enemies inside the ring. At 5th level, pick up Synaptic Static. It targets Intelligence, deals psychic damage (bypassing common fire resistances), and severely debuffs enemy attack rolls.

High-Level Spells

For Mystic Arcanum, take Mass Suggestion (6th) for encounter-ending control. Forcecage (7th) traps the BBEG with no saving throw. Feeblemind (8th) ruins enemy spellcasters, and Foresight (9th) turns you into an untouchable artillery unit.

Fey Touched

Take this at level 4. It rounds out your starting 15 Charisma to a 16, giving you a passive +1 to hit and spell save DC. Misty Step gets you out of melee so you can keep blasting, and grabbing Command saves you a Warlock spells known choice.

Resilient (Constitution)

Take this at level 16. Warlocks only have two spell slots for most of their career; losing concentration on a 5th-level Wall of Fire is catastrophic. Bumping your 13 CON to 14 while adding your proficiency bonus to saves ensures you almost never drop concentration.

Elemental Adept (Fire)

Take this in late Tier 3 or Tier 4. The Fiend Patron relies heavily on fire damage (Scorching Ray, Fireball, Wall of Fire). At higher levels, fire resistance is incredibly common among fiends and dragons. This feat allows you to ignore that resistance entirely.

Tier 1 (Levels 1-4)

Secure Studded Leather Armor as soon as possible. Your 14 DEX puts you at a base 14 AC. Look for a Bloodwell Vial +1 to boost your spell save DC so your early Command and Burning Hands land reliably.

Tier 2 (Levels 5-10)

Seek out a Rod of the Pact Keeper +1 or +2. This not only boosts your spell attacks and DCs, but lets you regain one Warlock spell slot as an action—effectively giving you a third Fireball per short rest.

Tier 3 (Levels 11-16)

A Staff of Fire is the holy grail for a Fiend Warlock. It allows you to cast Fireball and Wall of Fire using the staff's charges rather than your highly limited Pact Magic slots, exponentially increasing your daily damage output.

Tier 4 (Levels 17-20)

Upgrade to a Bloodwell Vial +3 or Rod of the Pact Keeper +3. If you can get your hands on a Robe of the Archmagi, your AC leaps to 17 before external buffs, making you incredibly tanky when combined with Dark One's Blessing.

You are a Blaster and secondary Controller. Because your primary survival mechanic (Dark One's Blessing) relies on you getting the killing blow, you pair best with characters who can soften targets up without necessarily executing them, like a Spirit Guardians Cleric or an Ancestral Guardian Barbarian who locks down aggro.

An Evocation Wizard is a fantastic partner; they can drop their own Fireball, sculpt it around you, and leave the enemies at single-digit HP for you to mop up with Eldritch Blast to harvest your THP. You also benefit immensely from a Grave Domain Cleric, whose Path to the Grave feature can double the 10d10 psychic damage from your Hurl Through Hell capstone.

Sorcerer 3 Dip

Taking three levels of Divine Soul Sorcerer gives you the Shield and Absorb Elements spells, vastly increasing your reaction-based survivability. More importantly, it gives you Metamagic. Quickened Spell lets you cast Fireball as a bonus action and still fire off a full volley of Eldritch Blast in the same turn.

Fighter 2 Dip

Starting Fighter 1 gives you heavy armor (which Dwarves can wear without a Strength penalty) and Constitution save proficiency. Taking Fighter 2 gives you Action Surge. Casting two 5th-level Fireballs in a single turn is a devastating opener that few encounters can survive.

• Letting allies steal your kills: Dark One's Blessing only procs if you reduce the enemy to 0 HP. If the Rogue kills the goblin you weakened, you get no THP. Coordinate with your team to feed you low-HP targets.
• Casting Armor of Agathys: It's a great Warlock spell, but Temporary Hit Points do not stack in 5e. If you cast AoA, the THP from Dark One's Blessing will overwrite it or be wasted. Skip it on this specific subclass.
• Wasting Dark One's Own Luck: You only get one 1d10 per short rest. Do not use it on a trivial History check. Save it exclusively for a critical concentration save or a saving throw against a debilitating effect like paralyzation.
• Forgetting to swap Fiendish Resilience: Don't leave your resistance on Fire if you are walking into an illithid colony. Change it to Psychic after your rest. Always adapt to the dungeon you are in.