The Artificer in our party has the ritual to brew common potions, but we are trying to figure out what he needs to learn to brew uncommon potions. Below is the ritual.
Liquids brew and bubble, coalescing the raw substance of magic into a form you can drink.
Component Cost: Special Market Price: 75 gp Key Skill: Arcana or Religion (no check)Level: 1 Category: Creation Time: 1 hour Duration: Permanent until consumed
You create a common potion or elixir of your level or lower. The ritual’s component cost is equal to the price of the potion or elixir you create.
And the errata:
Update (11/17/2010) In the first sentence of the ritual’s effect text, replace “potion” with “common potion or elixir.” In the second sentence of the ritual’s effect text, add “or elixir” after “potion.”