Prerequisite: Caster level 1, Profession (Etcher).
Benefit: You can create a rune of any spell you know. The rune is commonly etched into stone, wood or other solid material but the runes can also be painted, tattooed or otherwise 'marked' on a suitable surface. The base price of a rune equals its spell level x caster level x 75gp. Etching, or scribing a rune takes one day for each 1,000gp in its base price. To etch a rune, 25% of this base price is spent in XP and uses up raw materials costing 50% the base price.
Any rune 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 expend the material component or pay the XP when etching the rune.
Based on an article in Dragon Magazine October 2004.