Pestilent Mist is a Sorcery in Dark Souls 3. To cast a Sorcery you must use a Staff or Special Weapons that can cast Sorceries.

Pestilent Mist

Spell Type


Focus ConsumptionFocus Cost 13
Attunement SlotsSlots Used 1
Requirements 30 Intelligence
Type Lingering AoE



Highly dangerous sorcery employed by Dragon School spooks. Only taught to trusted members.

Releases dense mist that eats away at HP. Beware, as the caster is not immune to its effect.

A body caught in the silent mist cloud lies still, while the face twists in a tortured scream. The names of these learned sorcerers became feared for this gruesome spectacle.


Acquired From

  •  Can be bought from Orbeck of Vinheim for 1000 souls after giving any sorcery scroll.




  • The damage dealt is a percentage of the enemy's max HP. The higher their max HP, the more damage it will deal, making it extremely effective against certain bosses, such as Darkeater Midir.
  • Acts similar to Lifedrain Patch from Dark Souls II.
  • It deals damage to everything in its radius, including the caster. Try not to stand in it after casting. However, it does not hurt friendly phantoms.
  • This spell doesn't deal poise damage and will not stagger an opponent.
  • Very useful to kill mob enemies such as the Deacons of the Deep or the large crowd of Jailers in the lower level of Irithyll Dungeon, when used in combination with a lure such as an Alluring Skull or Aural Decoy.
  • This spell will not aggro most enemies, but they turn around and face the cloud except mimics(combined with Hidden Body+Slumbering Dragoncrest Ring works extremely good)
  • Its damage was increased by 150% in the 1.08 Patch. This makes it a very deadly spell, espically due to the spell having long lasting and large mercury cloud, which pretty much guarantees death for opponents stuck in tight spaces.
  • The overall damage and duration is fixed; damage boosting skills, items, rings (Crown of Dusk, Young Dragon Ring/Bellowing Dragon Ring, Clutch rings, Steady Chant, etc.) do NOT work. The damage also does NOT scale with your stats. (Easily verified against any mimic). 
  • Only one Pestilent Mist can be one screen at any time. If the player or an invading or friendly phantom casts a Pestilent Mist of their own, the previous one will disappear. (This may not be true, needs testing.)
  • Note that while its picture does have the same corroded scroll appearance shared by dark spells, it still gains no scaling whatsoever even when cast with the Izalith Staff. It may be a dark spell in flavor, but it isn't in practice.


  • Formerly called Pestilent Mercury, the Sorcery was renamed Pestilent Mist in Patch 1.15.
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    • Anonymous

      26 Aug 2017 10:43  

      so nothing has been changed mechanic-wise? If that's the case, can someone please put the old name and description in the trivia?

      • 08 Aug 2017 22:27  

        this spell has definitely been nerfed and no longer deals percentual damage! At least not against Midir.. To me it does around 3/4 of my max HP and for Midir it does only like 1/6

        • Anonymous

          19 Jul 2017 16:29  

          you can cheese the crystal sage in the archives with this as he doesnt recognize this as a hit. He'll stay in his first position and you can get the crystal scroll at the beginning of the archives

          • 06 Jul 2017 17:25  

            I just edited the info about the spell, It wont take aggro to any enemy if you have stealth, they just turn around and face the cloud(also mimics do not wake up)
            I have done an entirely PvE build based on this mechanic If you want to check it:

            • Anonymous

              04 Jul 2017 19:59  

              Um the more PM can be on the screen. The player can only have one cloud at a time but the same rules goes for others like phantoms. When I fought darkeater midir we both used PM and there was 2 of them. Might want to fix that.

              • Anonymous

                03 Jul 2017 10:06  

                Worked on Dragonslayer Armour. Had to run around the fountain all the time to cast it while he chased me but finally got him.

                • Anonymous

                  23 May 2017 19:09  

                  "Only one Pestilent Mercury can be one screen at any time."

                  Not correct anymore. I think it was 1.13 when they patched it. I fought Midir so often in past weeks and almost always saw 2 PM (Pestilent Mercury) beside each other AND stacking together (dealing double damage). By now I can confirm that I saw 3 PM at the same time, dealing triple damage to Midir.

                  Please Update!

                  • Anonymous

                    11 May 2017 12:02  

                    Useful against both encounters with midir .

                    - first encounter. Stand near his left arm and keep using this spell. You won't get hit at all. Easy cheese.

                    - second encounter. Good luck. Haha

                    • Pestilent Mercury [DKS3 Wiki]09 May 2017 00:58  

                      I love the fact that this spell hasn't actually changed at all, but only now are people acting like it's amazing and bothering to use it.

                      • Anonymous

                        09 May 2017 00:50  

                        This worked wonders against a certain slave knight, I was just messing around as a sunbro but it did the job!

                        • 04 May 2017 21:16  

                          This could easily be the best zoning spell in the game if not for the long cast time. Very useful in closed spaces due to its fog effect, it can also be used as a smoke bomb in which you can cast unpredictable spells from.

                          • Anonymous

                            23 Apr 2017 20:58  

                            Since spells don't dissipate when you rest at a bonfire, it is possible to kill yourself with this spell while resting.

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