Immortality (MCU)

Immortality, also called Eternal Life, is the concept of living in physical or spiritual form for an infinite length of time without dying. A subset of this is Eternal Youth, which allows for exemption from natural death such as from old age or disease, as well as halting age altogether. There are several methods in the DC Universe which can be sought after in order to become immortal.

Drawbacks
Even if one is immortal they are still susceptible to being trapped in a place where they cannot escape, be it different time era, dimension, etc. In the case of gaining eternal youth, they also are still susceptible to the unnatural taking of life such as murder or suicide.