And Then There Were Twenty

Prologue
On a normal summer day, on a normal summer afternoon, at a normal summer lunch hour, a girl was in a forest with what we creaters assumed was her brother. As they were walking, a errie green glow was coming from a valley below. "What's that?" the girl whispered. "I don't know." the boy said. "But it looks a lot like this." He pointed to his green and black watch that was glowing green too.