Revelation 19:20
And the beast was taken, and with him the false prophet that wrought miracles before him, with which he deceived them that had received the mark of the beast, and them that worshipped his image. These both were cast alive into a lake of fire burning with brimstone.

Revelation 20:10
And the devil that deceived them was cast into the lake of fire and brimstone, where the beast and the false prophet are, and shall be tormented day and night for ever and ever. 

 
 
Who will be thrown into this ETERNAL FIRE?

Those who do not have their names listed in the book of life (Rev. 20:15).

The antichrist and false prophet (Rev. 19:20).

Satan (Rev. 20:10).

The cowardly, unbelieving, vile, murderers, sexually immoral, those who practice magic arts, idolaters, liars, adulterers, male prostitutes, homosexual offenders, thieves, the greedy, drunkards, slanderers, and swindlers (Rev. 21:8; 1 Cor. 6:9,10). See also Gal. 5:19-21.

Those who are not Biblically born again (Jn. 3:3-7).

Those who didn't forgive others who sinned against them (Mt. 6:14,15; 18:22-35).

Those who begin with Jesus, but don't remain in Him because they afterwards believed and accepted a wrong plan of salvation (1 Jn. 2:24,25; 2 Jn. 9; Gal. 5:2,4; 1 Cor. 15:1,2).

Those who don't produce fruit (Mt. 25:14-46; Jn. 15:5,6), endure to the end (Mt. 10:22 cf. Jn. 6:66) or don't continue to believe, but "fall away" in time of TESTING (Lk. 8:13 cf. Mt. 13:21). [Persecution, in one form or another, is a TEST that comes to ALL godly people (2 Tim. 3:12; Lk. 6:22; Jn. 15:20).]

All who receive the mark of the beast and worship his image during the time of the Antichrist, which includes former Christians who do NOT patiently endure and remain faithful to Jesus (Rev. 14:9-12; 13:8-10).

Everything that causes sin and ALL who do evil (Mt. 13:41,42).

All who are self-seeking, reject the truth and follow evil (Rom. 2:8).