Complex sentence: Unknown to Iron Man, the Power Prism reforms and is found by a sanitation worker, who eventually brings it to evangelist Billy Roberts, who after learning of the Prism's abilities becomes the second Doctor Spectrum.
Split into simpler sentences: Unknown to Iron Man, the Power Prism reforms and is found by a sanitation worker. He brings it to the evangelist Billy Roberts, who, after learning of the Prism's abilities, becomes Doctor Spectrum.