Translation
The ten horns that you saw
are ten kings
who have not yet received a kingdom,
but are receiving authority for one hour,
along with
THE BEAST.
Paraphrase
You saw a display of all the legal power necessary which was distributed to the proper number of influential figures who have not yet been given a realm in which to exercise that authority, but are receiving authority for a short period of time,
and they will exercise that authority along with THE FEROCIOUS CREATURE.