Eighth Excalibur

This isn't your grandma's King Arthur story.Nate Arturi isn't a knight in shining armor. He sure as hell isn't a king. And the last time someone called him heroic, it was because he fetched his neighbor's corgi off the roof. But when an ancient alien beacon awakens on Earth, sounding the call to enemies near and far, the Merlin is left with little choice. Any Knight in a Doomsday, or so the saying...