Revelation 13:1: “And I" [John] "stood upon the sand of the sea, and saw a beast rise up out of the sea, having seven heads" [The rise of the Seven Kings] "and ten horns, and upon his horns ten crowns, and upon his heads" [Kings/leaders] "the name of blasphemy.”
Revelation 13:2: “And the beast” [The beast with Seven Heads and Ten Horns] “which I saw was like unto a leopard, and his feet were as the feet of a bear, and his mouth as the mouth of a lion: and the dragon” [Satan] “gave him his power, and his seat, and great authority.”
Revelation 13:3: “And I" [John] "saw one of his heads" [The SEVENTH head/The Eagle's right head] "as it were wounded to death;” [Killed] “and his deadly wound was healed: and all the world wondered after the BEAST.” The BEAST whose deadly wound was healed.
Revelation 13:5: “And there was given unto him" [The BEAST whose deadly wound was healed] "a mouth speaking great things and blasphemies; and power was given unto him to continue forty and two months.” Or 3 ½ years.