REVELATION 19.19 I saw the beast, and the kings of the earth, and their armies, gathered together to make war against him who sat on the horse, and against his army. 19.20 The beast was taken, and with him the false prophet who worked the signs in his sight, with which he deceived those who had received the mark of the beast and those who worshiped his image. These two were thrown alive into the lake of fire that burns with sulfur. 19.21 The rest were killed with the sword of him who sat on the horse, the sword which came out of his mouth. All the birds were filled with their flesh. -WEB Bible
The Antichrist and the False Prophet will be captured and meet their eternal punishment. All people who accepted the mark of the Beast and worshipped the image of the Antichrist will also be killed.
Where is the lake of fire? Obviously, it’s a horrifying place but Revelation doesn’t say where it is. Jesus also mentioned this fiery punishment in the Parable of the Net:
MATTHEW 14:47-50 "Again, the Kingdom of Heaven is like a dragnet, that was cast into the sea, and gathered some fish of every kind, which, when it was filled, they drew up on the beach. They sat down, and gathered the good into containers, but the bad they threw away. So will it be in the end of the world. The angels will come forth, and separate the wicked from among the righteous, and will cast them into the furnace of fire. There will be weeping and gnashing of teeth." -WEB Bible
IMAGE CREDIT: Kilauea painting by Ogura Yonesuke Itoh 1908, image revised by C.A. Stevens