Agelessness

The Cat has gone overboard with the Immortality, and I didn't like it, so this is our compromise.
Most ageless people and creatures do not age. Ta da. Their body doesn't do the diminishing return on energy exchange like those that age, with constantly-renewing cells of the same health as the cells they're replacing.

Agelessness is not immortality, but it can look like it. If one can avoid being killed or dying by accident, one can live for potentially hundreds if not thousands of years. Most creatures that aren't born that way often go mad before a few hundred pass.
How one comes across agelessness varies. Some creatures are born that way, others come by it through magic either accidentally or intentionally. 
Most creatures from The Feywild are ageless, while only a few are actually Immortal.

Type

Magical