Skybourne

A world where Arthurian legend is real and the children of Lazarus walk the earth as immortal warriors. Thomas Skybourne seeks Excalibur as the one weapon that might finally kill him, while his sister Grace works as an operative for the Mountain Top Foundation, a secret organization that captures and contains dangerous magical creatures and objects. Their primary adversary is a feral, malevolent Merlin who wants Excalibur for his own purposes.