'Mighty Acts' in the Bible

Many will say to me on that Day, 'Lord! Lord! Was it not in your name that we prophesied, and by your name that we drove out demons, and by your name that we did many mighty acts?'

and Simon also himself did believe, and, having been baptized, he was continuing with Philip, beholding also signs and mighty acts being done, he was amazed.

He, therefore, who is supplying to you the Spirit, and working mighty acts among you -- by works of law or by the hearing of faith is it?