Satan is a creature and ultimately has no power. He is powerless in the presence of Christ but he isn’t something to be toyed with or underestimated. The name of Christ isn’t something to be used for fame, recognition, or some demonstration of “magic”.
Acts 19: 11-20 (ESV)
The Sons of Sceva
And God was doing extraordinary miracles by the hands of Paul, so that even handkerchiefs or aprons that had touched his skin were carried away to the sick, and their diseases left them and the evil spirits came out of them. Then some of the itinerant Jewish exorcists undertook to invoke the name of the Lord Jesus over those who had evil spirits, saying, “I adjure you by the Jesus whom Paul proclaims.” Seven sons of a Jewish high priest named Sceva were doing this. But the evil spirit answered them, “Jesus I know, and Paul I recognize, but who are you?” And the man in whom was the evil spirit leaped on them, mastered all of them and overpowered them, so that they fled out of that house naked and wounded. And this became known to all the residents of Ephesus, both Jews and Greeks. And fear fell upon them all, and the name of the Lord Jesus was extolled. Also many of those who were now believers came, confessing and divulging their practices. And a number of those who had practiced magic arts brought their books together and burned them in the sight of all. And they counted the value of them and found it came to fifty thousand pieces of silver. So the word of the Lord continued to increase and prevail mightily.
Mark 5:1-20 (ESV)
Jesus Heals a Man with a Demon
They came to the other side of the sea, to the country of the Gerasenes. And when Jesus had stepped out of the boat, immediately there met him out of the tombs a man with an unclean spirit. He lived among the tombs. And no one could bind him anymore, not even with a chain, for he had often been bound with shackles and chains, but he wrenched the chains apart, and he broke the shackles in pieces. No one had the strength to subdue him. Night and day among the tombs and on the mountains he was always crying out and cutting himself with stones. And when he saw Jesus from afar, he ran and fell down before him. And crying out with a loud voice, he said, “What have you to do with me, Jesus, Son of the Most High God? I adjure you by God, do not torment me.” For he was saying to him, “Come out of the man, you unclean spirit!” And Jesus asked him, “What is your name?” He replied, “My name is Legion, for we are many.” And he begged him earnestly not to send them out of the country. Now a great herd of pigs was feeding there on the hillside, and they begged him, saying, “Send us to the pigs; let us enter them.” So he gave them permission. And the unclean spirits came out and entered the pigs; and the herd, numbering about two thousand, rushed down the steep bank into the sea and drowned in the sea.
The herdsmen fled and told it in the city and in the country. And people came to see what it was that had happened. And they came to Jesus and saw the demon-possessed man, the one who had had the legion, sitting there, clothed and in his right mind, and they were afraid. And those who had seen it described to them what had happened to the demon-possessed man and to the pigs. And they began to beg Jesus to depart from their region. As he was getting into the boat, the man who had been possessed with demons begged him that he might be with him. And he did not permit him but said to him, “Go home to your friends and tell them how much the Lord has done for you, and how he has had mercy on you.” And he went away and began to proclaim in the Decapolis how much Jesus had done for him, and everyone marveled.