Knowstone

Aura varies; CL varies
Slot —; Price varies Weight

DESCRIPTION
A knowstone is a semi-precious stone containing the formula for casting a spell within. A typical knowstone is a small, smooth semi-precious stone inscribed with an ancient arcane symbol. The stone itself typically has a value no greater than 25 gp before the etching of the arcane symbol.
A knowstone provides its bearer with knowledge of the
inscribed spell, which he can then use his spell slots to cast normally (as if the inscribed spell were among his known spells). The knowstone’s bearer need not make any conscious decision to use the knowstone apart from deciding to cast the inscribed spell. (This is considered part of the spellcasting action.) Any spontaneous caster can use a knowstone, provided that the spell it includes is on his spell list and he can cast spells of its level. For example, a bard may cast crushing despair from a knowstone of crushing despair if he can cast 3rd-level spells, whereas a sorcerer must be able to cast 4th-level spells to employ a knowstone of that spell.
A knowstone always appears in a piece of jewelry but does
not occupy a magic item slot. It takes 24 hours for a knowstone to attune to a new bearer, after which time the knowstone grants its inscribed spell.

CONSTRUCTION
You can create a knowstone for any spell you know.
Crafting a knowstone takes one day for each 1,000 gp in its base price; the spell level squared x 1,000 gp + expensive material components or focus if any (500 gp total price for a 0-level spell). To craft a knowstone, you must use up raw materials costing one-half of this base price. Creating a knowstone requires the Craft Wondrous Item feat.

Adapted from Dragon Magazine 333, page 93.

Knowstone

Rise of the Rune Lords Aubrey_