Arachnid Oil
Arachnid Oil is a blade oil in The Witcher 2 that coats Geralt’s sword with poison. Once applied, each hit has a 30% chance to poison the target, so it works against any foe that is not resistant to poison.
It has a duration value of 300 and does nothing to creatures immune to poisoning, so check the enemy before relying on it.
How to obtain
It is sold by the arena merchant. It can also be brewed from Formula: Arachnid Oil with Rebis, Quebrith, Hydragenum and Vermilion; the formula is sold by Felicia Cori (Chapters 2 and 3), Fioravanti, Lockhart and Myron.
Keep exploring
Plan a Remastered build: skill trees, mutagens, gear and a shareable build image.
Pick a potion, decoction or bomb and see every ingredient you need.
Answer the key choices and find out which Witcher 3 ending you will get.
Every location, quest and monster in the first region on one map.
The Wolf School's hidden valley: the keep, the Bastion, caves and treasure.
Tick off every school gear diagram and crafted piece, with diagram locations.
Search any monster and see the right oil, Signs and bombs.