Vesper Primer+Immediate Actions+Charmed Life

5/day, +5 to saving throws
At 2nd level, the swashbuckler gains a knack for getting out of trouble. Three times per day as an immediate action before attempting a saving throw, she can add her Charisma modifier to the result of the save. She must choose to do this before the roll is made. At 6th level and every 4 levels thereafter, the number of times she can do this per day increases by one (to a maximum of 7 times per day at 18th level).