Drust

Drust, a male Druid in the book Bec, is Bec's mentor. Leading Bec, Goll, Bran, Ronan, Connla, Corlan and Fiechna through an island, he reaches the tunnel in which he attempts to cut off a tunnel that links the island to the realm of Demonata. He is killed by Bec, who slices his throat with her nail; a sacrifice of a Druid or Priestess was required to close the tunnel.

Chess and Lord Loss
He is seen playing a game of chess by himself, and at one time Lord Loss is interested, asking him "what is that game? Can you teach me?". Therefore, it is thought he is the person that originally gave Lord Loss an appetite for chess. In addition to this, he has the Origin Board (the first chess board ever made, with magical properties). Lord Loss takes it from his dead body and is currently in possession of this.

Closing the Tunnel
He originally was going to sacrifice Bec, but is reduced to a half-life state by Bran (article yet to be made). He is inquired to be a quite powerful druid (mage), but he is frightful of a demon master such as Lord Loss.