Chimeras. Legion of others

Immortality is not a gift for "Chimeras" characters, but just the inability to die. And, despite most of them are resigned to this state of being, there are still those who are inconvenienced by infinity. Plating hide and seek with the time is boring them, and everything they want is natural finality. However, no matter what they do, their hearts continue to beat. Is there anyone who can break the system?