Kill Strange Beasts and Be Regarded as a Peerless Devil

A world where the whole nation is awakened and alien beasts are rampant. Chen Fan, a high school student, accidentally awakened the fatal kill system. [You have killed a nine-headed divine bird, and the critical kill value against the nine-headed divine bird is +1! [Your critical kill value against the Nine-Headed Divine Bird has reached the full value! [The damage of your normal attacks against the Nine-Headed Divine Bird is permanently increased by 100%. The Nine-Headed Divine Bird is permanently immune to 100% of the damage caused to you. You have a 100% chance of triggering an absolute kill effect on the Nine-Headed Divine Bird! [Absolute kill: Any basic attack can kill the nine-headed bird with one hit! [The critical kill value against the nine-headed divine bird reaches 100%, and you will gain eternal immortality! Chen Fan rose up powerfully. Facing the tide of millions of beasts, he slashed out with his sword. In an instant, millions of beasts were killed instantly, and mountains of corpses and seas of blood piled up on the ground! After that, a terrible legend emerged among all the races in the world. In the human race, there was a peerless demon who was ruthless and committed all kinds of evil. He would cause rivers of blood to flow when he struck out, and he would break through the world and destroy all races in one rage!