Revelation 12:3-4
And there appeared another sign in heaven, and behold, a great red dragon, having seven heads and ten horns; and upon his heads seven crowns.
Revelation 12:16-17
But the earth helped the woman, and opened it's mouth, and swallowed up the flood, which the dragon threw out of his mouth.
Revelation 13:2
And the beast which I saw was like a leopard, and his feet as the feet of a bear, and his mouth as the mouth of a lion: and the dragon gave him his power, and his throne, and great authority.
Revelation 13:4
And they worshipped the dragon, who gave his power to the beast, and they worshipped the beast likewise, saying, Who is like unto the beast? who is able to make war against him?
Revelation 13:11
And I saw another beast ascending out of the earth, and he had two horns like a lamb; but he spake like a dragon.
Revelation 16:13
And I saw coming out of the mouth of the dragon, and out of the mouth of the beast, and out of the mouth of the false prophet, three impure spirits like frogs:
Revelation 20:2
And he seized the dragon, that old serpent, who is the devil and satan, and bound him a thousand years,