For the Crown of the Old Iron King variant, see Smelter Demon (Iron Passage).

The Smelter Demon is an optional boss in Dark Souls II.


The Smelter Demon is found on the right side of the open area in the Iron Keep, past the first two rooms with Alonne Knights.


The Smelter Demon is similar to the Iron Golem in Dark Souls in that it is a construct made of iron that has been animated through some means. Its body is made entirely of iron except for a portion of its chest, which is hollow and exposes a core of flames.

The Smelter Demon was responsible for the death of the Iron King, and the fall of his kingdom.


  1. High fire resistance is recommended for this boss fight as the Smelter Demon will intensify the fire in its torso which will continuously damage the player if they are too close. After receiving more damage it will stab its sword in its flaming body (this doesn't affect the health of the Smelter Demon) and the sword will catch fire, making its attacks deal fire damage (Note: Reducing it to below 50% health fast enough will cause it to skip intensifying its fire and go straight to buffing its sword, effectively reducing his damage output).
  2. Being a ranged character will greatly reduce the difficulty of this boss fight as most of his attacks can be easily dodged and the boss itself isn't too fast, allowing the player to do a great amount of damage.
  3. Summoning Lucatiel and letting her tank the boss is a great strategy for both ranged and melee characters, but she won't last long as her shield doesn't have 100% physical reduction and she doesn't defend very often. However, she will likely survive until the boss stabs his sword into his chest.
  4. A Gyrm Greatshield will enable the player to negate the fire damage once the Smelter Demon ignites his sword, drastically decreasing the difficulty of the fight.
  5. Using a Lifegem will mitigate the damage inflicted by being close to the Smelter Demon when he strengthens the flame in his torso.
  6. The Smelter Demon can execute a damaging area-of-effect attack a few seconds after it lands from its jumping attack which can catch players off-guard.

If the player is using spells/miracles/hexes the fight will be easier as he doesn't need to deal with the fire damage inflicted by staying close to the Smelter Demon. If the player casts offensive miracles to the Smelter Demon, he should cast it once because of the delayed casting time of the spell; if the player attempts to cast another one, the Smelter Demon would probably connect a hit. Depending on the spells the player is using he can connect two hits (Great Heavy Soul Arrow) or one (Soul Vortex) depending on the cast time delay the spell has.

When the Smelter Demon is using his belly to power up himself, the player should avoid casting any type of magic because his defense rises when he does that, but the player should cast Dark Fog or Toxic Mist because the Smelter Demon isn't resistant to poison but is still highly resistant to it and it dose not do much damage once poisoned anyway.

The player should avoid blocking the Smelter Demon's attacks if they don't have high fire resistance, especially when the boss infuses his weapon.


Boss informationEdit


Overhead Slam: Holds his weapon with both hands and performs an overhead slam. If in the phase while the demon's sword is on fire, then it will shoot out a trail of flames.

Lunge: Charges at the player and thrusts his sword towards the player

Double Strike: Swings his sword twice in a row, sometimes follows it up with a jumping attack.

Jumping attack: Leaps towards the player and plunges his sword in the ground for a while. May decided to do an AoE explosion attack or simply take the sword out of the ground.

Flame Aura: After some health has been taken off the demon, will start an animation and buff himself up. This buff gives a flame aura that does damage while the player is really close to the demon.

Fire Blade: Stabs his belly with his sword and imbues it with fire. All attacks have added fire damage, a Gyrm Greatshield is a good shield to block all of the demon's attacks.


Physical Defenses
Icon DaSII PhyDef Icon DaSII StrikeDef Icon DaSII SlashDef Icon DaSII ThrustDef
??? ??? ??? ???
Elemental Defenses
Icon DaSII MagDef Icon DaSII FireDef Icon DaSII LtnDef Icon DaSII DarkDef
??? ??? ??? ???
Icon DaSII PsnDef Icon DaSII BldDef Can be Backstabbed Can be Parried
??? ??? No No

These stats have been estimated through various formulae, and as such, may not be precise.


Item Boss Soul
Smelter Demon Soul
Drop Rate Guaranteed



  • The Smelter Demon shares the same battle theme as the Ruin Sentinels.




Dark Souls II OST - Ruin Sentinel-0

Dark Souls II OST - Ruin Sentinel-0

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Aldia, Scholar of the First SinAncient DragonBelfry Gargoyles
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Sir AlonneSkeleton LordsSmelter Demon
Smelter Demon (Iron Passage)The Duke's Dear FrejaThe Last Giant
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Velstadt, the Royal AegisVendrick

Start a Discussion Discussions about Smelter Demon

  • smelter demon

    2 messages
    • i was standing by the fog gate before i went to go fight this boss and i had to go to the bathroom so i stood by the summon sign for an npc ...
    • Did you actually summon the NPC? If so she probably died trying to run off and fight stuff. If not than I can't think of any reason her s...
  • Merging/Separation of Smelter Demon pages

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    • Lucians sword wrote:I think they need to be seperated. They are different strategies for each boss, they are located in completely differ...
    • Final result of the poll is 28 for separate pages and 12 for merging the pages. The pages will be separate.