Complex sentence: The giant circuit, when adequately fuelled, was capable of transferring massive amounts of energy over vast distances, enough to create a black hole that served as a "gateway to hyperspace" to transport an invading force of Nimons to the planet Skonnos.
Split into simpler sentences: The giant circuit, when adequately fuelled, was capable of transferring massive amounts of energy over vast distances, enough to create a black hole. The black hole served as a "gateway to hyperspace" to transport an invading force of Nimons to the planet Skonnos.