[Beast Tamer + Gu Insect + Assassin + No Female Protagonist + Decisive Killer + No Transformation + Cthulhu + Lone Wolf + Countless Trump Cards...]

(No system, but with cheat codes!)

A strange invasion, the appearance of ten evil kings, and the continent is full of dangers!

Chen Fei, who is still a freshman, obtained the Holy Book of Killing. Just by killing, he can quickly improve the strength, qualifications, and skill proficiency of monsters.

Restrictions: Can only contract assassin-type monsters.

(【Assassin】is an attribute, not a profession!)

[Ten Thousand Poisons: Can use a variety of toxins to trigger a Zerg disaster!]

[Phantom Fox: Soul, illusion, and dream systems, killing people invisibly. 】

[Hidden Sky Skeleton King: Combination of the Necromancer and Space systems, assassination comes and goes freely!]

【......】

Classmates and friends: "No, we haven't even graduated yet, and you can already beat up the evil king?"

"No, you ascended before we even graduated?"

......

This book is also known as: "My pet animals are all natural disasters!"

"Beast Taming: A Gu and a Hang at the Beginning"