My Apocalypse System Arrives 10 Years Early

After fresh rain in the empty mountains, the evening air brings the feel of autumn. Li Xiang brandished his self-made High-Density Chopping Knife, and with a single strike, a bamboo stalk as thick as a bowl's mouth snapped and broke. Suddenly, an ordinary earth viper shot out. With a gentle flick of his knife's tip, Li Xiang severed the earth viper's vital spot, and its ferocious head fell to the ground. System: “Congratulations, Host, for killing the Tier One Exotic Beast. You have received a surprise reward.” “What the hell? This ordinary earth snake is an Exotic Beast?” Li Xiang pinched his chin and fell into deep thought. “...It's supposed to mutate ten years from now when the Apocalypse arrives and demonic and monstrous energies invade, right? Hmm, I've just slain an Exotic Beast in its infancy. My merit is immeasurable.”