Dysfunctional Reaper

An unknown force breached earth and accompanying it was monsters that caused destruction through out earth. Humans fought with all their strengths from weapons to fists but nothing could damage the monster until a message from the sky appeared and a countdown started. Humans thought that God has sent salvation down but instead after the countdown finished , 1/3 of the human population was blessed with a abilities that could help them defend their planet but what about the other 2/3 of earth? They became slave workers to the ones with abilities. After 70 years , the disaster still continues and a hierarchy was still continuing as humans without abilities will became slave workers. But what's this? There's a savior? With a system? But what kind of system? You wanna know? It's.....