Foreign Battlefield: I Have a Practice Room

Darkness is approaching, and everyone on Blue Star is affected by mysterious power. "Extraterritorial battlefield?" … Changan obtained a gradeless training room at the beginning. Since then, he has faced vicious monsters, supernatural skeletons, high-dimensional technology, and even gods and demons! Oh, this world is quite big. Wow, your method of summoning rain has won my heart. I'll give it a try. What's wrong, someone else says that my calling for rain is a heretic? Doesn't it look a bit like a waterfall? What kind of magic is this? Let me tell you quietly, this is heavenly magic. Where did it come from? Not telling you. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.