In 2258 AD, the world changed drastically, and external creatures invaded, commonly known as monsters, ushering in a new era.
In the 16th year of the Galaxy (2274), in the dilapidated civilization, someone accidentally discovered that they could sign a contract with a monster. The two complemented each other and exploded with powerful power, allowing human civilization to continue.
In Galaxy 182, someone discovered that after a demonic beast ascends, it can return its power to itself, making itself as powerful as the demonic beast.
In Galaxy Year 224, humans are divided into two major categories, the ancient warrior category and the beast-controlling category. The two are further divided into more small branches, and have friendly, hateful and neutral relationships with each other.
In Galaxy Year 309, humans counterattacked. After three years of fierce fighting, they suffered heavy losses and did not injure the monster army at all.
In Galaxy Year 499, mankind once again rebuilt civilization and prepared for a second attack...
Purpose: Try writing and enhance writing skills