I Must Have Saved the Galaxy in My Previous Life

[Humanity favored by fate + The Strongest Cthulhu + Faith: Destroy all Cthulhus] When Mo Wuyou was working the night shift at the funeral home, he found a corpse eating another corpse. When he tremblingly pressed the alarm bell, the lights in the entire funeral home suddenly went out. In the darkness, the eating corpse turned around, smiled and said, "Don't be afraid, I'm here to help you awaken." The next morning, Mo Wuyou opened his eyes, and his left eye in the mirror was dancing with a cluster of gray flames. And a line of text appeared in his mind: "Welcome to the world of spellcasters - you have been selected by the 'Lord of Gray Fog'."