You tell me where they come from! Satan is "transformed into an angel of light". What prophecy? What's been prophecied and did it come true? How about gifts of healing? Do people's broken legs get mended visibly in front of your eyes when a so-called healer touched the person? The tongues were a sign yo unbelievers and spoken in earthly tongues according to scripture; is that what you mean? Or is it a bunch of incoherent, undiscernable babbling during a "church" service when the whole group is babbling outloud at the same time? So, you tell me!
You do not get out much, do you. You do not know what prophecy is. Amazing miracles of healing take place continually. The dead have been raised. As John Wesley observed, it is doubt and unbelief that quenches the Holy Spirit, so limiting the power of God.
The fact that there are false manifestations does not mean that there are no true manifestations. Sure, it is not right to have everyone speaking in tongues in a meeting. I've pulled out of places where that was normal practice. The so-called Toronto Blessing and similar "signs" are an abomination. Jesus warned us that such things would happen. And yes, the elect can be deceived.
I have many testimonies of fulfilled prophecies that seemed impossible at the time. Just one:
We were led to start a Bible school. My wife said that the Lord had shown her where we were to be. It was a run down building but was being refurbished. It had been converted into studios for artists. There was no way that we could lease a space. We were told by the letting agent that there was caveat on the property. The owner had specifically stated that it was for artists only.
That was enough for me. I looked elsewhere. My wife said no, we were promised that site. So we kept in touch with the management of the building. One day, I went there to inquire again. The people told me that they had been evicted. The building had been sold and was to be demolished. The owner had died and the family wanted to sell.
I discovered that the site was owned by an accounting firm. It "just so happened" that I had used the accountants for years to do my taxes. We were able to secure first right of refusal even before the building was completed.
We were there for two years, the length of time that my wife saw in the Spirit. There is no such thing as coincidence.