These have power — And they use that power. See Revelation 11:10. To shut heaven, that it rain not in the days of their prophesying — During those "twelve hundred and sixty days." And have power over the waters — In and near Jerusalem. To turn them into blood — As Moses did those in Egypt. And to smite the earth with all plagues, as often as they will — This is not said of Moses or Elijah, or any mere man besides. And how is it possible to understand this otherwise than of two individual persons?
Related Commentaries of Revelation 11:6
Revelation 11:6
6 These have power to shut heaven, that it rain not in the days of their prophecy: and have power over waters to turn them to blood, and to smite the earth with all plagues, as often as they will.