#L3Z0, affectionately nicknamed Lezo, is a government experiment on the process of fusing animals into weapons to be used by the military. Even though Lezo was just a serial code amongst thousands of experiments, they grew to love the government workers and form a strong bond. However, it was not to last. One day, an unknown attacker sent bombs to the government facility, killing the countless amalgams and dozens of workers. Miraculously, Lezo managed to survive, yet they were haunted and driven insane by overwhelming grief and poisonous fumes from shattered flasks and beakers. They essentially brought upon the apocalypse, picking off the remaining humans one by one in search of the attacker. They continue to mindlessly rampage today, despite the fact that they unknowingly killed the attacker long, long ago.