Έλαια are blade enhancements which provide specific, though temporary, additional qualities to silver and steel swords. Some oils are sword specific, while others are general purpose.
Bases
Formulae with 3 ingredients or those with 4 ingredients require a high quality base,
Formulae with 5 ingredients require a top quality base.
Notes
The creation of sword oils (coatings) requires the Oil Preparation skill.
All oils have a duration of 24 hours, or "long".
Only one oil can be applied per sword at a time. The effects do not stack. Using a new oil on a sword will replace any current oil and its corresponding effects.
All-purpose oils[]
Italic text in Effect column reflects the in-game text whilst mousing over a sword to which an oil has been applied.
Images
Name
Ingredients
Effect
Brown Oil
Brown Oil accelerates bleeding; creatures lacking a circulatory system are immune to its effects. Considerable chance of causing Bleeding in foes with every hit.
Crinfrid Oil
A blade coated with this substance causes crippling pain to a wounded creature; creatures which do not feel pain are immune to its effects. Considerable chance of inflicting Pain on foes with every hit.
Hanged Man's Venom
This blade coating poisons wounded opponents, yet it is ineffective against monsters whose physiology differs greatly from that of humans. Considerable chance of Poisoning foes with every hit.
Mystery Oil
unknown
Eliminates corrosion and improves low quality blades. Found (not reliably) in the kikimore queen's lair (on her body?), on the werewolf's body, on Azar Javed's body, in a chest in the old mine and in the trunk in the striga's chamber. Testing performed on said low-quality weapons such as the Rusty Sword have yielded no results.
Oils for silver swords[]
Except for Argentia, these oils can also be used on steel swords, it is simply preferable to use a silver sword against the creatures for which they are intended.
Images
Name
Ingredients
Effect
Argentia
Witchers coat their silver blades with Argentia, which increases the effectiveness of silver, but weakens steel blades. Damage inflicted increased by 60% (silver sword); Reduced Damage incurred (steel sword).
Insectoid Oil
A blade coated with this substance inflicts increased damage on all insectoid creatures. Damage inflicted on insectoids increased by 100%.
Necrophage Oil
A blade coated with this substance inflicts increased damage on necrophages. Damage inflicted on necrophages increased by 100%.
Ornithosaur Oil
A blade coated with this substance inflicts increased damage on ornithosaur. Damage inflicted on ornithosaur increased by 100%.
Specter Oil
A blade coated with this substance inflicts increased damage on specters. Damage inflicted on specters increased by 100%.
Vampire Oil
A blade coated with this substance causes increased damage to all types of vampires. Damage inflicted on vampires increased by 100%.
Detrimental oils[]
These blade coatings actually harm your blade, so beware!
Images
Name
Ingredients
Effect
Detrimental oil
any other combination
This oil would likely be labelled "unknown oil" until you used it, at which point your blade will be weakened for 24 hours (or until you apply new oil).