Alchemy

Creating any batch of potions requires the Alchemist's Tools proficiency as well as a Wisdom (Insight) or Intelligence (Investigation) check DC 14. Your DM may increase or decrease this DC if they feel the batch is more or less complex than the majority of potions being made. Unlike other crafting methods creating potions is relatively straightforward but does require research on ingredients.

Basics
Each potion ingredient has two effects. It requires two effects of the same kind to take effect in a batch. For example two ingredients with 1d4 healing as an effect will make a 1d4 healing potion. Additional effects of the same type stack past two effects so to make a 2d4 healing potion it requires three ingredients with 1d4 healing. There are many potential combinations of ingredients; each with their own niche use. In order to create a poison for a blade, oil must be added as a reagent.

Crafting the Potion
Crafting any batch of potions yields four potions of that type in a single batch. When using a cauldron this number is doubled to eight and if water is used as a reagent then a batch will yield eight potions (sixteen with a cauldron) with halved effects. For example a 2d4 healing batch will instead become a 1d4 healing batch. When regarding dice used in potions, always round down if there are an odd number of dice used.

Each batch of potions has four 'slots' meaning that up to four ingredients may be combined. This does not include reagents which will be detailed later in this section. Any matching effects become a part of the potion. Using a Calcinator these effects can be made to only include beneficial effects (healing, removal of conditions, etc) while a Retort does the inverse; creating exceptional poisons. An Alembic doubles the dice of the potion (a 2d4 healing potion becomes 4d4).

All potions require one week of downtime to brew them though this time includes preparing, brewing and allowing the potions to settle before they are bottled and prepared for distribution.

Reagents
There are a number of reagents in the game and each works as follows on the table below. Any batch of potions may only have a singular reagent though it does not count towards the total ingredient list of the potion in question.