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Tenacious Magic [Epic]
Spellcraft 15 ranks.
Choose one spell the character knows or spell-like ability the character possesses. Whenever the chosen form of magic would otherwise end due to a dispel effect, the magic is instead only suppressed for 1d4 rounds. The magic still ends when its duration expires, but the suppressed rounds do not count against its duration. The character can dismiss his or her own spell or spell-like ability (if dismissible) or dispel his or her own tenacious magic normally.