In The Witcher computer game Edit

Insectoid oil
Details
Ingredients
Base	high-quality
Effect	Damage +100% to insectoids
Duration	24 hours

"Huge viys, kikimores and other insectoids suffer greater damage from weapons coated in this poison invented by witchers. Witchers also use Insectoid oil to rid their fortresses of bugs and parasites."

A blade coated with Insectoid oil inflicts increased damage on all insectoid creatures. Damage inflicted on insectoids is increased by 100%.

Source Edit

• The Book of the Kiss

In The Witcher 2: Assassins of Kings Edit

Insectoid oil
Oil. Increases damage dealt to insectoids
Description
Category	Common
Type	Sword upgrade
Ingredients
Effect(s)	+20% to insectoids
Duration	5 minutes
Source	starting equipment / craftable
Price to buy	50 – 126
Price to sell	6
Weight	0.2

Geralt begins the game with four of these. The formula can be bought from Anezka in Lobinden.

Journal EntryEdit

This blade grease increases sword damage dealt to arachnids and creatures similar to insects in their physiology. It is the most effective oil against monsters of this type.

This oil is ineffective against humans and monsters other than insectoids.