Another World: I Can Contract with Boss Monsters

A thunder struck down, and Luo Xing came to another world. Monsters are everywhere in this world. After human beings have experienced the terrible apocalypse, a large number of superpowers have appeared, and they are constantly fighting against the monsters that appear. "The system is opening, successfully bound, you have successfully integrated with the system, the system name is boss contract system" Luo Xing woke up the system in confusion. Where is the terrifying boss-level monster? Take me to find it quickly. I can add another contracted beast. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.