This imp is pathetic at everything like any ordinary imp. But there is one thing only he can do, and that is being teleported to the overworld. There he faces many problems. The sun burns and fries him. Everything's trying to kill him. And the first devil himself visits his dreams to threaten him from time to time. His task is mind numbingly difficult. So difficult in fact, that all the twenty-three devils combinded could not complete it, and that is to travel through the cave-system all the way from the overworld to hell. 

But he has a fighting chance as the primal devil himself is supporting this little imp with a system. It will help him grow stronger as he travels through the cave-system, deep, deep, underground where such foul creatures lie that hell seems like a friendly place in comparison. But the primal devil isn't doing anything altruistically, but is training up the imp for a very special reason. 

 [participant in the Royal Road Writathon challenge]

This will be an imp evolving and growing stronger as he delves deeper underground.