Life Extension (3.5e Variant Rule)
From D&D Wiki
|This material is published under the OGL|
 Life Extension (Wis)
You can extend your natural lifespan and ignore the physical effects of aging.
Requirements: Psychometabolism feat
Check: Each month you can make a Life Extension check (DC 20). If successful, you do not physically age for that month. If the check fails, you age normally. Keep separate track of your chronological and physical age. Ability score bonuses accumulate according to your chronological age, but ability score penalties accumulate according to your physical age, and your lifespan is measured by your physical rather than chronological age.
Special: You cannot take 10 or take 20 on Life Extension checks.