Complex sentence: It changes it's outer layer as a human body and restores original face of Prophet, thus technically ressurecting him as he grabs the dogtags of his deceased squad members thinking how much he sacrificed his humanity and his own body in the quest for victory.
Split into simpler sentences: It changes it's outer layer to a human body and restores original look of Prophet, technically ressurecting him. Prophet then grabs the dogtags of his deceased squad members thinking how much he sacrificed his humanity and his own body in the quest for victory.