Complex sentence: Gathering their magic with the device, Sunset assumes an alicorn-like form and closes the rifts; she and Spike then reach out to Twilight, who regains her senses and returns to normal.
Split into simpler sentences: Gathering their magic with the device, Sunset assumes an alicorn-like form and closes the rifts. She and Spike then reach out to Twilight, who regains her senses and returns to normal.