Abyss Invasion: I Can Infinitely Increase My Combat Power

In 2300 of the Old Calendar, in order to explore the mysteries of the earth's core, humans inadvertently opened the door to the abyss. Countless abyssal monsters poured into the human world, bringing huge disasters to mankind. In the battle with the monsters of the abyss, human beings awakened various talents and gained powerful power. At this point, human beings have officially entered the era of magic energy! In the 100th year of the New Calendar, the use of magic energy has become increasingly mature, and strong humans can compete with the monsters of the abyss. In the 200th year of the New Calendar, the connection between the abyss world and the earth and the star has become more and more closely connected, and the monsters that appear have become more and more powerful. Humanity has gradually fallen into decline and lost a large area of ​​living space. It was forced to shrink its defense lines and build a survival base. In the 300th year of the New Calendar, Lin Xuan unexpectedly came to this world and activated the Unparalleled God of War System. As long as he defeated or killed powerful enemies, he would be able to obtain certain combat power increases and performance rewards. The increase in combat power can give Lin Xuan extraordinary strength as a demon hunter, while the performance can help him quickly improve his realm, skills, talents, etc., Which can also increase his combat power. So, with the help of Lin Xuan, the human world gradually reversed its decline and began to counterattack the abyss...