The Cardmaster in a World Descended Upon by All

More than three hundred years ago, spatial rifts began opening across the Earth, and monsters with all kinds of abilities emerged from them. Humanity was on the brink of extinction under the monsters' invasion. Then one day, people began to awaken. They received starter cards, whose power allowed them to defeat and kill monsters. After killing them, they discovered that the monsters left behind cards identical to their starter cards. They grew stronger and stronger, until they had driven most of the monsters back to their original world and began their counterattack…

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.