I Can Actually Upgrade!

Because the earth has unique resources, the demons from other worlds created a portal so that monsters can be transported to the earth to plunder resources. The high-latitude people "Zero" saw it and gave humans some abilities to fight the monsters and demons out of entertainment. Once the demons have certain resources, the demons can teleport over and occupy the earth. Some people in the high latitudes started chatting and betting, as if they regard the earth as a place of entertainment... Little did they know that weak humans can one day kill "gods"!