Longevity is an extended lifespan, the ability to age slower than normal, though not to a superhuman degree. Its basically a lesser version of Immortality, a type of abnormality that vastly lengthens the lifespan of the individual possessing it. Some people or creatures who have longevity don't age at all, thus calling it Semi-Immortality.
Capabilities[]
Individuals with this ability are at the peak of human conditioning. For this very reason, they age slower than normal members of their species due to having extremely healthy cells, without any superhuman degree. In addition, this power would activate when the user is in his/her young-adult years and they'd look twenty-years younger. If one were to "super-charge" this ability, then the user would achieve the superhuman version of this ability (the user could gain immortality if the augmentation is powerful enough). Finally, the user could live up to 130-135 since this power is at peak-human level.