Complex sentence: Out on patrol, Nocturn, who knows Eddie Collins is ShadowHawk, attacks him and, after a brutal fight, Hawk's Shadow comes out of the shadows to face his "returned" arch-enemy.
Split into simpler sentences: Out on patrol, Nocturn, who knows Eddie Collins is ShadowHawk, attacks him. After a brutal fight, Hawk's Shadow comes out of the shadows to face his "returned" arch-enemy.