Complex sentence: As he activated the Well of AllSparks to create life, he reformatted the dead creatures of the planet into mechanical beings, creating creatures like the Predacons, a race of Cybertronian dragons parallel to Earth's dinosaurs.
Split into simpler sentences: As he activated the Well of AllSparks to create life, he reformatted the dead creatures of the planet into mechanical beings. Among the first creatures to be created were the Predacons, a race of Cybertronian dragons parallel to Earth's dinosaurs.