Beast Invasion? Having a Killing System Will Eventually Make You Invincible

When Lin Yu was in his third year of high school, he traveled to a parallel world of supernatural powers and ferocious beasts. He thought he would reach the peak of his life, but the system was not activated for a long time. Five years later, the beast wave struck. Just a second before Lin Yu died from the beast wave, the killing system suddenly appeared, giving Lin Yu a chance to start over. Within the system space: "Hey, isn't this a small forest? It's been like this for five years." "The dog system, five years, a whole five years, do you know what I have proven in these five years?" "Hey, let me ask you if you want this SSS-level power." Lin Yu: This time I will overturn everything and start over again. Fierce beast: "I'm warning you, don't come here." Kill decisively, not the Holy Mother. Any similarity is purely coincidental.