In a blog post, Stephen Radney-MacFarland wrote:
While in First Edition, potions were spells of 3rd level or lower in a bottle; we wanted to go a slightly different route this time. Potions not only can have effects that reach into higher levels, but they also don't need to be tied to particular spell effects.
Source
I'm trying to wrap my mind around potions in Pathfinder Second Edition. I get that they are no longer necessarily tied to a spell, but let's say we still want to create "spells in a bottle".
In First Edition, potions were double the cost of a scroll for a given spell level according to Tables 15-12 (p. 478) and 15-15 (p. 491) of the Core Rulebook. For instance, a 3rd-spell-level potion would cost 750 gp, while the scroll for the same spell would cost 375 gp. This makes sense given the added convenience of a potion.
In Second Edition, we have Table 11-3 (p. 565) for Scroll Statistics, but we don't have an equivalent table for Potions. I'm attempting to reverse-engineer the logic for determining the item level and cost for a potion. Here are some example potions from the Core Rulebook (pp. 562-564), all of which provide the effects of 2nd-level spells:
1) Invisibility Potion: Spell level = 2 / Item level = 4 / Cost = 20 gp
2) Barkskin Potion: Spell level = 2 / Item level = 4 / Cost = 15 gp
3) Potion of Water Breathing: Spell level = 2 / Item level = 3 / Cost = 11 gp
I'm failing to see a pattern for determining the item level based on the spell level, and the cost doesn't seem to be purely based on the item/spell level. Can I get some insight on this from the powers that be? Thanks!