Been playing the witcher lately, and this is a potion that comes comes in pretty handy.
Potion of Escalating Assault
When you drink this potion, you feel the anger build in you.
For the next hour, when you enter a fight, after each melee hit, increase your melee damage by 1, up to double your proficiency bonus. The bonus to melee damage is reduced to zero if you miss an attack or do not make an attack in turn.