"Crossing the Line of Fire: The Myth of Doomsday" is your best choice! In this apocalyptic world, there were monsters running amok without any weapons to defend themselves. However, the protagonist, Dragon Shisan, had his own Firewire System, which allowed him to easily buy Hero-level weapons. He had a Fire Qilin in his left hand, a Thunder God in his right hand, a Shura and a God on his waist, and a Sky Lord and a Dragon Slayer on his back! The degree of freedom is very high! I hope you like this fairy's recommendation. Muah ~😗