Battle potions are brewed through the same rune-matching alchemy system as every other potion, but the combat tier increases the rune cost and ingredient complexity with each level. Brewing rules and station requirements are covered in the Alchemy guide.

More context

Alchemy Flasks and Fuel are required for every brew. Formulas must be discovered and recorded in the Folio. The Laboratory's ingredient slot limit depends on its tier: I holds 2, II holds 3.

Healing potions

PotionRune costExample ingredients

Healing Potion

2 Red

two Clay or two Sand

Healing Potion II

4 Red

two Red Mushrooms or two Stones

Healing Potion III

5 Red

Red Mushroom or Stone plus Melted Fat

Damage potions

PotionRune costExample ingredients

Damage Potion

1 Red + 1 Green

Clay + Berry

Damage Potion II

2 Red + 2 Green

Clay or Sand + Beeswax

Damage Potion III

3 Red + 3 Green

Copper Nugget + Beeswax

Other combat-relevant brews

BrewRune costNotes

Dream Dust

1 Green + 1 Blue

Water + Blood; unusual because it requires no Faith.

Fighter

+3 damage per level

Stack multiple levels for compounding damage.

Berserk

removes all sword stamina cost

Lets you swing without waiting for stamina regen.

Higher tiers and early-game Red

Higher-tier healing and damage potions are gated by Anatomy and Alchemy Technologies in the tech tree. Red is the early bottleneck for battle potions because many damage-rune ingredient sources are also needed for general healing. The best early sources are: Copper Nuggets — 2 Red + 1 Green; Stones — 2 Red.