Being thrown alive into a lake of fire.......to be destroyed, never again resurrecting to life, eternally separated from the glory of God would be: deadly (where there is no death), a sentence for lawbreaking (a horrible consequence), and complete, eternal apartness from God's glory (a bitter alternative).
A belief in the immortality of the soul is your stumbling block. Only once in scripture is anyone called immortal....and that is Christ. [2 Timothy 1:10]
A great verse that bears repeating, but it's 1 Timothy 6:16 you're probably thinking of:
1Ti 6:15 Which in his times he shall show, who is the blessed and only Potentate, the King of kings, and Lord of lords;
1Ti 6:16 Who only hath immortality, dwelling in the light which no man can approach unto; whom no man hath seen, nor can see: to whom be honor and power everlasting. Amen.
1Ti 6:15 which He will bring about at the proper time--He who is the blessed and only Sovereign, the King of kings and Lord of lords,
1Ti 6:16 who alone possesses immortality and dwells in unapproachable light, whom no man has seen or can see. To Him be honor and eternal dominion! Amen.
According to the bible, there's no such thing as an immortal soul, except for Christ's soul. That will change at the return of Christ.
How can one in "complete, eternal apartness" from God's glory, be sentenced, involved in a bitter alternative, or otherwise in a bad way if they no longer exist?
What's there to risk if I were to believe what you believe?