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11 Weapon oils and vials are an alchemy output in Fatekeeper. They coat a weapon for a number of swings, adding an elemental damage type, a status effect, or another modifier on hit. Vials let melee builds mimic some of the elemental flexibility of casters, and they let casters extend their elemental theme into close range without committing more skill points.
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33 What Vials Do
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55 Add elemental damage. Fire, ice, or wind-themed coatings add elemental damage on top of the weapon's base damage.Apply status. An ice vial freezes; a fire vial burns; specific named vials may add unique effects.Set up combos. Ice vials are the easiest non-magic path to Shatter.
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77 How to Get Them
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99 Vials are produced through the alchemy system, by combining three ingredients and choosing the weapon-vial output. Discovered recipes can yield vials with unique properties beyond raw ingredient sums.
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1111 Build Roles
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1313 RoleWhy VialsConsumable AlchemistCornerstone of the build. Skill-tree nodes increase duration and chance not to consume.Ice Shatter (light)Ice vials replace ice-magic skill points for hybrid Shatter Druids.Pyro meleeApply fire vials to a sword to extend pyromancer pressure into close range.
1414 Live-Build Changes
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1616 A June 2026 update significantly sped up weapon coating, so applying a vial to a weapon takes less time than it did at launch. This makes mid-fight coating swaps more practical for melee builds that lean on elemental vials.
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18+The One Named Coating
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20+Only one coating appears in the 0.1.3 game files, which puts the vial system in the same position as the amulet slot: the mechanic is built and described, but the roster behind it is still nearly empty.
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22+CoatingRarityValueNotesBitterleaf CoatingUncommon20The only named weapon coating in the files
23+One named coating against three named bombs and four named potions suggests coatings are the least-developed of the three alchemy outputs so far. The developer has said the potion and vial selection will keep growing, so this is a roster to re-check after each content patch rather than a settled list.
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25+Worth noting alongside it: the Venomblade dagger carries a line that improves coating efficiency, which is the only item in the files that interacts with the vial system directly.
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1827 Open Questions
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20-Specific named vials, swing counts per coating, and stacking rules between vials and ingredient effects are unconfirmed. The system has been described in dev material with the understanding that more details are coming in a future alchemy-focused dev post.
29+Swing counts per coating and stacking rules between vials and ingredient effects are unconfirmed, and only one named coating exists in the build so far. The system has been described in dev material with the understanding that more details are coming in a future alchemy-focused dev post.