Lycus was once a powerful and remorseless leader of Libya. On a mission to take his rightful place as his father's champion, he had a hell hound infiltrate Titans Tower and it ended up killing Marvin and putting Wendy in a coma. Afterwords, Lycus met up with his aunt, Cassandra Sandsmark, and challenged her to a battle. Lycus claimed that everyone he killed made him stronger. Cassie was able to call the other Titans for help. While the other Titans were occupied with the hell hound that happened to grow to the size of a big building (most likely from gaining power from killing people as well), Lycus forced his young aunt to fight him. Lycus told Cassie that when he killed someone, he not only got more power, but she lost some of hers! He could have kept killing until she had no energy left