Spell Shape

This spell gives the wild mage the ability to seize magical energy directed at him and reshape it as he desires. While it is in effect, the spell gives no visible sign of its existence. It offers no protection against area effect spells.
If a wild mage is the target of a spell or magical item, this spell automatically allows him a saving throw. If the saving throw is failed, the opponent's spell has normal effects. If the saving throw is successful, the spell shape absorbs the magical energy of the opponent's spell. The wild mage can then choose to let the energy dissipate or he can instantly use it to cast a spell back at the opposing mage. The return spell must be of an equal or lesser spell level than the original one and must be currently available to the mage. The act of returning the spell does not cost the wild mage any of his spell slots. Spell energy cannot be saved; if not used immediately, it dissipates.
For example, Hamos, a wild mage, is protected by a spell shape and is struck by a Finger of Death (a 7th-level spell). He succeeds at his saving throw and is now able to cast a spell of 7th level or lower. Hamos currently has Feeblemind memorized. Since it is only a 5th-level spell, he chooses to cast it back at his enemy. He makes his level variation check (and doesn't get a wild surge) and the feeblemind is sent hurtling back at his foe. Hamos still has his original feeblemind available, as this counter-casting does not expend any of Hamos slots. The remaining two spell levels are lost, since they were not used in the same round.
If a wild mage is struck by two spells at once, he may choose which spell to shape. He suffers all effects of the remaining spell.
When the spell is cast, the diamond is transformed into a lump of coal.

[Tome of Magic]

School:Wild Magic
Magic Type: Alteration
Restrictions: Wild Mages only
Level: 7
Rarity: Common

Range: 0
Components: V, S, M
Duration: 1d4 +1 rounds
Casting Time: 1 round
Area of Effect: The caster
Saving Throw: Special

Material Components:
a diamond worth no less than 2,000 gp