You can instantly sacrifice magical energy in order to gain a bonus to your reflex save.
Benefit: As an immediate action, by sacrificing an uncast spell or unused spell per day (for spontaneous casters) you can gain a bonus to a Reflex save. The bonus is equal to the level of the sacrificed spell and applies to the next single Reflex save that you make. Alternatively, you can sacrifice a spell as a move action and gain a bonus equal to one-third of the level of the spell to all of the Reflex saving throws you make within a number of rounds equal to your mystic theurge level.
Undefeatable: The Collected Feats Sourcebook, Copyright 2009 – 2010, Louis Porter Jr. Design, Inc. Undefeated, Copyright 2011, Louis Porter Jr. Design, Inc.