“And another sign was seen in heaven, and, look! a great fiery-colored dragon, with seven heads and ten horns and upon its heads seven diadems;

Revelation 12:3,

Those seven heads and ten horns indicate that he is the architect of the political wild beast soon to be described in Revelation chapter 13. This beast also has seven heads and ten horns. Since Satan has a diadem on each head​—seven in all—​we can be sure that the world powers represented in that wild beast have been under his rulership. (John 16:11)