Pressure Resistance

Type: General
Source: Dragon #314

Your body adjusts quickly to changes in water pressure.
Prerequisite: Deep Diver, Endurance, Skill Focus (Swim), Swim 4 ranks.
Benefit: Once you successfully make Fortitude saving throw to resist damage caused by water pressure, you no longer need to make Fortitude saving throws to avoid damage caused by pressure at that depth. If your depth changes by 100 feet, you must begin making new Fortitude saving throws as normal until you succeed again.
Normal: You must make a Fortitude saving throw (DC 15 + 1 for each additional saving throw) once every minute to avoid suffering damage from water pressure.

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