Level: Sorcerer 9, Wizard 9
Components: V, S, F
Casting Time: 1 standard action
Range: Personal
Effect: Matrix that holds three of your spells
You prepare a magical matrix that allows you to store three of your spells and use one or both later as a swift action.
In the round after you cast spell matrix, you can cast three spells of up to 3rd level to be stored in it. The matrix closes after 3 rounds, whether or not you have stored any spell in it. Only a spell that can be altered by the Quicken Spell feat can be placed in the matrix, and any spell stored there is treated as a prepared spell. Casting spell matrix deals 3d6 points of damage to you, and this damage cannot be healed by any means while the matrix exists.
While the matrix is active, you can cast a spell stored in it as a swift action. Once it is cast from the matrix, the spell is gone. You can also decide to link the two spells stored in the matrix into a spell sequence if both are 2nd level or lower. You can then discharge the two linked spells as a single swift action, just as if you were casting the lone spell from a spell matrix.
In addition, you can designate one spell or one spell sequence held in the matrix to come into effect under a condition you dictate when casting greater spell matrix. The spell (or sequence of spells) to be activated by the triggering condition must be of a type that affects your own person, such as levitate or feather fall. The conditions required to bring the desired spell or spells into effect must be clear, although they can be general. In all cases, greater spell matrix immediately brings into effect the designated spell or sequence of spells, which is cast instantaneously when the designated circumstances occur. You cannot choose to have the spell or spells not activate when the triggering event occurs.
A dispel magic spell that successfully dispels the matrix also dispels any spells held inside it. If you are affected by an antimagic field, the duration of the matrix is interrupted, but the spells do not activate. The matrix becomes active again when you emerge from the antimagic field. If you die while any spells are still held in the matrix, both the spells and the matrix dissipate harmlessly.
Focus: A diamond with a minimum value of 1,500 gp.
Source: Spell Compendium, page 199.