Potion Crafting

A character can practice alchemy in their downtime by crafting useful concoctions such as potions, acid, or alchemist's fire.

Requirements

Proficiency in Herbalism or Alchemist kits, which ever you use the Item must be within your inventory. In order to brew a potion you must have taken an hour to examine the item or cast the spell Identify on it, in order to know how you can replicate it. Homebrew Items cannot be crafted unless otherwise stated

Resources

You'll also need an amount of gold and downtime days depending on the rarity of the item. Crafting powerful magical items requires materials and crafting methods that gold alone cannot purchase such things must be quested for. Some items require one or more quests to gain such materials.

Rarity	Downtime Points	Total Cost	Character Level Requirement	Required Quests
Common	1	50gp	3	0
Uncommon	3	250gp	5	0
Rare	5	2,500gp	8	0
Very Rare	8	12,500gp	12	1
Legendary	10	25,000gp	17	2

Resolution

Make a number of d20 checks equal to the total number of days needed. Add your proficiency to each roll and calculate how many fail a DC16. If you have expertise in the relevant tool set, you may add your proficiency bonus twice to each roll and calculate how many fail a DC16. For each failed check the downtime and gold cost are increased by 1 day and 25 gp (you do not roll additional d20's for these days). If you do not have enough downtime or gold to cover the increased cost you may pay the costs at a later time (you do not complete the item until costs are paid).

Contract Work

You can help other players brew potions. The downtime and gold cost may be split in whatever way you wish. If the downtime is split evenly between all players, the crafter may add your proficiency to the rolls they make. This stacks alongside your own proficiency bonus. If it cannot be split evenly, the excess day may be taken from any of the participants. The total number of days should add up to the original number. If a person has expertise in relevant tool, you may add their proficiency bonus twice. Brewing a potion with contracted work is generally the best way to craft magic items and can remove the need to make the checks entirely.

Prequest Action

Your character can spend the night before a quest preparing potions. You can take an Uncommon or Common (non-homebrew) potion and split it into a number of smaller but just as potent temporary doses (and lose the potion in the process). The total number of temporary potions you may break it into 2 doses. You must already have a potion of the appropiate type to split it.