Complex sentence: In the final battle against Albion, Dark Marvel Girl is mortally wounded while saving Nocturne's live, still, despite her injuries, Jean and Nocturne find the source of the technology blackout.
Split into simpler sentences: In the final battle against Albion, Dark Marvel Girl is mortally wounded while saving Nocturne's life. Still, despite her injuries, Jean and Nocturne find the source of the technology blackout.