Prerequisites: Magic Attack Bonus +3.
Benefit: You can create a spell matrix that will cause a spell effect to take place under a certain set of circumstances. Scribing a matrix takes one day for each 1,000sp in its base price. The base price of a matrix is the spell's Threshold × the spell's MP cost × 5sp. To scribe a spell matrix, you must spend 1/25 of this base price in XP and use up raw materials costing one-half this base price.
Any matrix 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 scribing the matrix.