Daniel 7:21 "I kept looking, and that horn was waging war with the saints and overpowering them

Revelation 9:1 Then the fifth angel sounded, and I saw a star from heaven which had fallen to the earth; and the key of the bottomless pit was given to him.

Revelation 13:1 And the dragon stood on the sand of the seashore. Then I saw a beast coming up out of the sea, having ten horns and seven heads, and on his horns were ten diadems, and on his heads were blasphemous names.

Revelation 13:7 It was also given to him to make war with the saints and to overcome them, and authority over every tribe and people and tongue and nation was given to him.

Revelation 17:8 "The beast that you saw was, and is not, and is about to come up out of the abyss and go to destruction. And those who dwell on the earth, whose name has not been written in the book of life from the foundation of the world, will wonder when they see the beast, that he was and is not and will come. (NASB ©1995)