Caustic Magic

Caustic Magic (Su; Int): You can imbue your acid magic with the terrifying power of caustic vapors. When you deal acid damage to a foe with a spell, spell-like ability, or supernatural ability, as a swift action you may also force that foe to make a Fortitude save or be considered flanked by you for 1 round. You may use this ability a number of times per day equal to 3 + your Intelligence modifier

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