Original sentence: Eternity appears semi-regularly in the Silver Surfer'' animated series.Eternity can also form avatars from another plane of existence known as the Dimension of Manifestation.Eternity is an abstract entity that with fellow entity Infinity represents the space-time continuum and the living force of the universe.Eternity makes a cameo appearance in an episode of X-Men: The Animated Series
Edited sentence: Eternity can also form avatars from another plane of existence known as the Dimension of Manifestation, whose extent of power and behaviour vary in relation to how well they synchronise with the allotted entity.Eternity is an abstract entity that with fellow entity Infinity represent the space-time continuum and the living force of the universe