Well, I've been a Christian for 7 months now at 32 years old. Before coming to Christ, I had about 3 or 4 encounters a year with gray or black cloud-like entities. That happened ever since I was a toddler.

I've had lots and lots of demonic attacks of various forms now that I've come to Christ, especially in the first 3 months. Possibly around 100 separate occasions. Appearances of the gray or black cloud-like entities that I had seen before continued but much, much more frequently. I also witnessed a lot of new manifestations such as shadow people that would follow me around during the day, numerous sleep paralysis episodes (multiple a night and sometimes so intense I would wake up with convulsions), a heavy burning weight on my chest, electrical sensations on my scalp that felt like a hand petting me, demonic dreams (essentially conversations where they try to tell me that my views on salvation or a Christian's authority over the demonic are incorrect), and poltergeist activity (paper towel roll unrolled itself, loud knocks on the walls at night and only whatever wall I'm looking at, a bottle of water started fizzing and boiling out, a pizza box opened and closed itself multiple times).

At a certain point, I became frustrated and defiant. I gathered up all of my books that I considered potentially demonic or occult-related and threw them in the trash the night before trash pickup. I stayed out on my porch and (quietly, so as not to disturb the neighbors or anything) taunted the entities and declared that my house was now off-limits to them. At one point during this, I saw the outline of a shadowy figure come up to me. I commanded it to go away and it charged me. It looked like it hit with its entire torso and head...although the sensation felt like being hit with an overcharged wave of static electricity across my forehead, arms, chest, and shoulders. It disappeared when it did this.

That's the most dramatic physical confrontation I've had and it was early on when I was still trying to stand up to them in my own strength. I've since learned to lean on Christ completely and trust in Him to fight for me. At one point, as I was growing stronger in my faith and trust in the Lord, I had a very nasty, blasphemous thought come into my mind that I just knew didn't come from me (some profanity cursing God). I said very quickly, "In the name of the Lord Jesus Christ I command you to go to the Abyss." and there was a loud "BOOM!" like a bomb going off right in front of me.

I went upstairs to see if my flatmate heard anything, she said she heard a loud explosion and saw a black spherical cloud materialize about two feet from her. She then heard a whooshing sound and it was gone. Apparently the demon wanted to scare someone else on the way out. It worked, she and her cat were pretty freaked out for awhile. I've called on Jesus to send demons away or declared, "The Lord Jesus Christ rebuke you!" They leave, and quickly, but never in such dramatic fashion as that.