Complex sentence: The newly-empowered Anath-na battles the New Warriors, but when forced to face his feelings for Karim decides to merge with her into a composite entity, which goes back in time to live a normal life.
Split into simpler sentences: The newly-empowered Anath-na battles the New Warriors. But when forced to face his feelings for Karim, he decides to merge with her into a composite entity which goes back in time to live a normal life.