Gadwall
Gadwall is a witcher potion in The Witcher 2 and a stronger form of Swallow. It speeds up Vitality regeneration, both in and out of combat, which makes it a good pick before long, tough fights against powerful monsters.
It has drawbacks: while active, Geralt deals less damage and his Vigor drains faster. Drinking Rook or Tawny Owl helps offset these effects. Gadwall adds 40 Toxicity, a heavy load, and has a duration value of 600.
How to obtain
It is sold by the arena merchant. It can also be brewed from Formula: Gadwall with Rebis, Vermilion, Caelum, Sol and Aether; 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.