Complex sentence: He has designed other devices based on Deviant technology and his own innovations, which was manufactured by Subterraneans under his supervision; these include teleportation devices, flying vehicles, and gigantic earth-borers.
Split into simpler sentences: He has designed other devices based on Deviant technology and his own innovations, which was manufactured by Subterraneans under his supervision. These include teleportation devices, flying vehicles, and gigantic earth-borers.