'Mighty Angel' in the Bible

And I saw another mighty angel coming down out of heaven, clad with a cloud; and a rainbow was upon his head, and his face was like the sun, and his feet like pillars of fire.

Then a mighty angel lifted a boulder like a great millstone, and hurled it into the sea, saying, "So shall Babylon, the great city, be overthrown with a mighty fall, And shall be found no more at all.