While we still live in this world, we may experience some trials and temptations of the devil because he will only be defeated completely at the coming back of our Lord Jesus Christ. Apostle Paul continues to give hope to the church in Rome and assure them of the destiny of the devil. And the God of peace will crush Satan under your feet shortly. The grace of our Lord Jesus Christ be with you. Amen. (Romans 16:20)
The final destiny of the devil will be the lake of fire. The devil, who deceived them, was cast into the lake of fire and brimstone where the beast and the false prophet are. And they will be tormented day and night forever and ever. (Revelation 20:10).
Remember that he will say according to Matthew 25:41“Then He will also say to those on the left hand, ‘Depart from Me, you cursed, into the everlasting fire prepared for the devil and his angels. (Mathew 25:41)