Complex sentence: Revealed as a mutant, Piotr thinks his life is over; however, Jean Grey finds him and offers him a place among the X-Men, a team of young mutants dedicated to bringing about peaceful coexistence between the humans and mutants.
Split into simpler sentences: Revealed as a mutant, Piotr thinks his life is over. However, Jean Grey finds him and offers him a place among the X-Men, a team of young mutants dedicated to bringing about peaceful coexistence between the humans and mutants.