The Dark Summoner

This is a story about a boy named Ethan Dawson who discovers he's a magic user In a world where magic users are slaughtered and no one knows why. Ethan discovers that there's a relam that can keep him and his fellow magic users safe from this world. They call it the magic relam. Later he comes to know the magic relam has lost its immortality stone without Which the magic relam won't last for more than ten years. Will Ethan be able to retrieve the immortality stone before it's too late ?.