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 in the Iron Keep, in a circular room after crossing the drawbridge in the wide open lava area with several Alonne Knights.


The Smelter Demon is similar to the Iron Golem in Dark Souls in that the Demon is a construct made of iron that has been animated through some means. His body is made entirely of iron except for a portion of his 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]


  1. High fire resistance is recommended for this boss fight as the Smelter Demon will intensify the fire in his torso which will continuously damage the player if they are too close. After receiving more damage, he will stab his sword in his flaming body (this doesn't affect the health of the Smelter Demon) and the sword will catch fire, making its attacks deal fire damage. Reducing the boss to below 50% health fast enough will cause him to skip intensifying fire and go straight to buffing the 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 himself 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 he lands from his jumping attack which can catch players off-guard.

If the player is using spells/miracles/hexes, they won't have to deal with the fire damage inflicted by staying close to the Smelter Demon. If the player uses offensive miracles, they might want to cast it one at a time because of the delayed casting time of the spell; if they attempt to cast another one, the Smelter Demon would probably connect a hit. Depending on the cast time delay of the spell the player uses, they can connect two hits (Great Heavy Soul Arrow) or one (Soul Vortex).

The player might want to 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 up with a jumping attack.
  • Jumping attack: Leaps towards the player and plunges his sword in the ground for a while. May decide 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.


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


  1. Smelter Demon Soul item description
Aava, the King's PetAfflicted Graverobber, Ancient Soldier Varg, and Cerah the Old Explorer
Aldia, Scholar of the First SinAncient DragonBelfry Gargoyles
Burnt Ivory KingCovetous DemonDarklurkerDemon of SongDragonrider
Elana, the Squalid QueenExecutioner's ChariotFlexile SentryFume Knight
Giant LordGuardian DragonLooking Glass KnightLost Sinner
Lud, the King's Pet & Zallen, the King's PetMytha, the Baneful QueenNashandra
Old DragonslayerOld Iron KingProwling Magus and Congregation
Royal Rat AuthorityRoyal Rat VanguardRuin SentinelsScorpioness NajkaSinh, the Slumbering Dragon
Sir AlonneSkeleton LordsSmelter Demon
Smelter Demon (Iron Passage)The Duke's Dear FrejaThe Last Giant
The PursuerThe RottenThrone Watcher and Defender
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.
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