Is It Reasonable for a Science Fiction Mage to Rub a Black Hole with His Hands?

This is a world where demons are rampant and all the people are magicians. Zhou Zheng, who traveled through time, awakened as a gold mage. Other metal mages can only control gold elements, but he can control all metal elements! So: When others build a magic circle and release fireballs, wind blades and other spells. Zhou Zheng built pistols, machine guns and other magic arrays, using elements as cannonballs. When other mages changed their profession to the ice or healing system, Zhou Zheng changed his profession to the physics and chemistry system. "I am a physical and chemical mage. I wear a steel suit and use nuclear bombs as forbidden spells. Is that okay?" "A mage from the physics and chemistry department changed his profession for the second time and became a science fiction department. Is it natural?" "A science fiction mage rubs a black hole with his hands. Is it reasonable?" When the alien army arrived and prepared to attack the planet Earth, I turned around and saw that my home was gone! Alien Army: "What about that? Do you want servants? Someone who is capable, not picky about food, and speaks nicely?" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.