Your mastery of your chosen art, and your strong inner will, has dramatically extended your lifespan.

Prerequisites: Timeless body class feature or ability to cast 7th-level arcane spells.

Benefit: Your maximum age is doubled. You still reach the middle-age, old, and venerable age categories at the same time that you normally would, but you do not die until you are twice as old as the age at which you would normally die of old age.