Spellbook of Redundant Enchantment

Activate—Retain Incantation (concentrate)

Frequency once per day

Trigger You Cast a prepared mental Spell that has no effect because all targets critically succeeded on their saving throws

Effect You quickly divert the failed magical energy into yourself to retain your favored spell in place of another. You lose another spell you prepared of an equal or higher rank to the triggering mental spell but retain the ability to Cast the mental Spell again.