A potion produced by the Alchemy Association that when inhaled makes the creature or person go into a state of berserk. Their eyes will turn red and they will no longer be able to tell friend from foe. They will also become extremely aggressive.
Nie Li used this potion in one of his lines of defense during the recent Demon Beast Horde. It was placed inside the bamboo spears and thrown at groups of demon beasts to cause them to attack each other.