The Black Hole Demon Lord of Greedy Demon's Cave

The devil's cave appears in the world, and hundreds of countries compete. The academy wins and the magic opens up. What's in the Devil's Cave? Treasure chests, equipment and magic! Poor people also have bad luck. College student Qiu Mingyue performed a college mission and obtained the black hole magic book in the magic cave. From then on, the owner of the most powerful magic in the world was born... Because of a magic, countless garbage disposal companies came to Qiu Mingyue to sign contracts and became billionaires. Because of a magic, Qiu Mingyue was named the International Environmental Protection Ambassador of the Year, making great contributions to the earth's environmental protection and actively promoting positive energy. Because of a magic, even the official invited Qiu Mingyue to discuss the mystery of black holes and the birth of the Demon Cave... Because of a magic, he is a god who has been pushed into the abyss by countless people! (Since no one has written a Greedy Cave fanfic, I will try the water and try to modify the Greedy Cave. Overall, there are still many differences)