Potion of Strength is a common enchanted item added in Total War: Warhammer. It has a single activation ability which grants a major boost to armour-piercing and base weapon damages of its user over an average period of time. It can be equipped by a lord or hero.
The sludgy black liquor in this stern glass flask is a Potion of Strength, allowing the drinker to cause devastating damage.
Ability: "Potion of Strength"