Complex sentence: She then revealed that she was after Emma all along, so she takes Gideon's heart and orders him to find and kill Emma, then bring the Hrunting sword back to her, which will free her from the Dark Realm.
Split into simpler sentences: She then revealed that she was after Emma all along. She takes Gideon's heart and orders him to find and kill Emma, then bring the Hrunting sword back to her, which will free her from the Dark Realm.