
McDaygo |

So I’m looking for flavor/mechanical ideas on how to expand the natural life span of a creature (npc) without taking the capstone to stop aging.
Here are some ideas I had:
1) Give him 3-4 levels of Prc Soul Drinker and he discovered a way to use the souls to add say 1d4 years to his life each time. Band aid effect.
2)As he is a flesh warper. Design a flesh graph if one doesn’t exist to make him live longer in exchange for an unknown/undecided trade
3) He explores going undead (lich or other intelligent template)
A quirk of the character is he is all about discovery and playing “god”
Kidnaps random life forms. Makes fleshwarped abominations and mutants and release them. Dissects new races to discover why say a gnome is so different then a elf. He doesn’t want death to interfere with his obsession.

Wonderstell |

5) Eat healthy, train regularly, avoid irregular sleeping patterns, adopt hobbies that aren't related to work, and set aside time for your friends and social activities. Just because you're eeeeeevil doesn't mean you can't have a healthy lifestyle.
Consider some lofty elf that has a maximum age of 350+4d100 years and makes sure to watch their cholesterol intake. That's almost two centuries of extra time for horrific experimentation compared to the average elf.
6) Reincarnate. The spell creates a 'young adult body' for the soul to inhabit, so just pay someone to cast it whenever your back begins to hurt.