Another thing to notice about the Revelation 13:4-8 Scripture, is its link to the Daniel 7 and Daniel 11 about the coming Antichrist ("little horn") for the end of this world...
Dan 7:8
8 I considered the horns, and, behold, there came up among them another little horn, before whom there were three of the first horns plucked up by the roots: and, behold, in this horn were eyes like the eyes of man, and a mouth speaking great things.
KJV
Dan 7:11
11 I beheld then because of the voice of the great words which the horn spake: I beheld even till the beast was slain, and his body destroyed, and given to the burning flame.
KJV
Dan 7:25
25 And he shall speak great words against the most High, and shall wear out the saints of the most High, and think to change times and laws: and they shall be given into his hand until a time and times and the dividing of time.
KJV
Dan 11:36
36 And the king shall do according to his will; and he shall exalt himself, and magnify himself above every god, and shall speak marvellous things against the God of gods, and shall prosper till the indignation be accomplished: for that that is determined shall be done.
KJV
Because of that link of those Daniel verses with the Rev.13:4-8 Scripture, it means Lord Jesus made the Book of Daniel prophecies about the "little horn" and "vile person" of Dan.11 part of His Book of Revelation, and we are to study them together.