an aincient war machine, scared by his past and trapped deep under ground awakes when a mine breakes into his prison. what will happen when equestria once again faces a threat that almost tore it apart 7500 years ago?

Deep in a crystal mine 2 miles north of canterlot a large cavern is discovered. And a long forgoten machine wakes to once again roam equestria while reaping the lives of all in its wake. Or will it? Its sence of moral and its need for orders conflict with its need to slaughter all life it finds.