A lesson on the coming Antichrist:
In Matthew 24 (yeah, Matt.24 again), in the 23-26 verses, our Lord Jesus is showing us a specific false one coming to Jerusalem to work great signs and wonders (i.e., miracles), that IF... possible, would deceive even His very elect. The KJV translators translated the Greek word pseudochristos as "false Christs", making it seem plural. But the context of the Matt.24:23-26 verses are actually singular, about a singular false-Christ which our Lord Jesus said to not believe on. That's the coming Antichrist who comes first at the end of this world.
In 1 John 2:18, John mentioned to the brethren they had already heard that antichrist shall come. Then he told them there were already many antichrists at work. That is TWO different objects, a singular Antichrist they already heard shall come, and his many antichrist servants they learned about then from John. In John 14:30 our Lord Jesus warned that the prince of this world cometh, and has nothing in Him. That had to have been how they had already heard the antichrist would come. (Who's the 'prince of this world'? the devil)
In Matthew 24, the same alignment appears about the Antichrist. In the first part of the chapter Jesus warns that 'many' will come in His name, saying they are Christ. But no great signs and wonders are attached with those. Those are the 'many antichrists' idea of John. They represent many that have already come through history, claiming to be The Christ, some of them even in my era (Moon, Jim Jones, David Shayler, etc.).
But in Matthew 24:23-26 it is different. This one is to work great signs and wonders to deceive. That one is the actual Antichrist, a fake Christ coming to play God in Jerusalem, given power to perform miracles that will deceive the whole world.
In 2 Thessalonians 2 we have a repeat of this deception event. Apostle Paul calls the coming deceiver "man of sin", "son of perdition", "that Wicked", and shows a repeat of what our Lord Jesus showed about the signs and wonders he will work to deceive, sitting in the "temple of God" (a physical rebuilt temple in future Jerusalem for the end of this world). Paul says he will show himself that he is God, and exalt himself over all that is called God, or that is worshiped. That is 'the Antichrist'.
In Revelation 13:11 forward, we are told about the "another beast", a 2nd beast. But this 2nd beast is to have two horns LIKE a lamb (i.e., Jesus), but speak as a dragon (Satan per Rev.12:9). In essence that is about a disguise of the dragon as The Christ, or as our Lord Jesus put it in Matt.24:24, a pseudo-Christ. Further in that section of Rev.13, we are shown that 2nd beast will rain fire down to the earth from Heaven in the sight of men. We are told he will do "great wonders", and will deceive those on earth by those miracles he will have power to do. That... is 'the Antichrist'.
In the Rev.13:4-8 verses, we are foretold that "dragon" will be given power to work 42 months over all nations and peoples (1260 days, or 3.5 years). We are told the whole world will worship that "dragon", except those whose names were written in the book of life from the foundation of the world. That "dragon" is the Antichrist. That "dragon" is another title for Satan himself (Rev.12:9; Rev.20:2).
So don't confuse men's doctrines about that "another beast" of Rev.13 being just some false prophet and not the coming Antichrist that will demand to be worshiped as God for the end. And by the way brethren, our Lord Jesus was a Prophet also (Deut.18:15). So don't confuse the role of the 'false prophet' with a whole other person. It's just another role that "another beast" will play, just as he is called a "beast" also, but will be a king (per the Rev.17:8-11, and Rev.9:11 Scriptures).