The existence of God has been made known to you by an entity describing himself as someone being against God (this entity is not necessarily inherently evil). You know that this being is who he says he is, because he has made time stop and you now exist with only this entity and a God that has yet to make an appearance, but who is now known (not just believed) to exist.
The anti-God entity has asked for you help in aiding him in a revolt against God and his legions. He asserts that God is not omnipotent; his very existence is an argument to this assertion (how can an entity that exists to undermine an all-powerful being exist, or how can anything that knowingly opposes God’s will exist?) His promise to you is that once you have aided in helping him overthrow God, he will reward with whatever your heart desires. His powers are limited, however, in that he can grant everlasting life but not omnipotence. You would aid the entity in his battle against God, not knowing whether God is truly omnipotent or not, and also not knowing whether the outcome will result with the anti-God entity being victorious.
If you refuse, however, you are subject to this entity’s wrath through torture and eventual death (where you are then subject to God’s judgement based on the way you’ve lived your life, not taking into account your belief/disbelief in whatever organized religion, as this is a generic God). You could also choose suicide, but, again, you are subject to God’s judgement in the afterlife and probably won’t gain everlasting life in His prescence because suicide is viewed as being morally wrong. Assume that living in God’s prescence means living in constant content and bliss, whereas, living outside His prescence means living a life of constant emptiness.
So the question is, would you help the entity in overthrowing God?
I wouldn’t, because I know that this entity has the capacity to be evil (as evidenced by his torture of those refusing to comply) and could probably screw me out of the promise that he has made to me. I’ve lead a pretty moral life up to this point (as I’m sure alot of people will assert) and probably wouldn’t be in any danger of being denied entrance to everlasting bliss. Helping the entity isn’t guaranteed to work, and like I said, I’d probably feel like I’d end up being screwed by this being, so it wouldn’t be worth it in my eyes.
Please feel free to call to my attention any inconsistencies in the scenario that you have encountered, so that I may able to clarify.