From Compendium of Worldly Lore
Needs review
Source: Masters of the Wild
Description: You store a divine spell within a specially prepared herb
Prerequisites: 3rd Level Caster, Wilderness Lore (4 ranks)
You create an infusion of any divine spell available to you. Infusing an herb with a spell takes one day. When you create an infusion, you set the caster level, which must be sufficient to cast the spell in question but not higher than your own level. The base price of an infusion is its spell level times its caster level times 50 gp. To create an infusion, you must spend 1/25 of this base price in XP and use up raw materials costing one-half this base price. Any infusion that stores a spell with a costly material component or an XP cost also carries a commensurate cost. In addition to the costs derived from the base price, you must also expend the material component or pay the XP when creating the infusion.