Feat Distil Potion (Item Creation)
The witch can distil potions, and can also control the potency of the potion.
Liber Mysterium The Netbook of Witches and Warlocks
By Timothy S. Brannan and The Netbook of Witches and Warlocks Team
Prerequisites: Spellcaster 7th level or Venefica 6th level, Brew Potions
Benefit: This feat is similar to the Brew Potions feat, save that stronger, more powerful potions, poultices, libations, or philters may be made. Spells 6th level and lower may be used in the potion’s construction. The witch can create any potion from any spell that she can cast at seventh level or lower. Distilling a potion takes 1 day.
When she creates a potion, she sets the caster level. Her level must be sufficient to cast the spell in question and no higher than her own level. The base price of a potion is its spell level multiplied by the witch’s level multiplied by 75 gp. To distil a potion, the witch must spend 1/25 of this base price in XP and use up raw materials costing half this base price. Any spell components or XP costs required for the base spell are added to the final costs of the potion.