Deader than Alive

Kurik is a bored Shinigami, so he takes Ryuk's advice for having fun: dropping a Death Note for a human to pick it up. Not just any human, though- the next Kira, the perfect psychopath. Ryuk suggests trying worlds where humans reside other than Light's own, and by accident, drops it in the House, where it is picked up not by the once-human Piper's Children but an immortal. Whups.