wow, lotsa ideas from everyone. I understand the excitement of coming up with something "unusual" (everyone's bored with stereotypes and overused formulas) but just remember the true Christian message you're representing in whatever you do, ya? I mean this in a gentle and kind way.
Pray....just pray. The Holy Spirit will always give you an inspiration or idea to work on.
Alright, here's how I've revamped your idea, ninja. All I did was use a human instead of a demon! I usually don't like to deal with angels/demons. ^^ Everyone knows I'm super busy BUT if we have other artists and writers working on it, I think I can help.
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There's a powerful human being/warrior(?) who can't remember his past (amnesia formula reused hahaha!). All he remembers now is that Satan is the King of the Earth and therefore, he serves him and carries out all his evil plans. He collaborates with demons (he can see and talk to them) WITHOUT realizing that it's actually wrong. But one day, our hero...ahem I mean protagonist experiences something that triggers back memories (haven't figured exactly what yet). Memories of himself knowing another King in his life. memories of him experiencing joy, peace, truth, wisdom...
"Aarrggghh it's too much to bear...it's so confusing!" He hasn't heard of such words before. Or at least, it doesn't make sense. And yet, they are so....comforting. Makes him feel good and calm inside. Safe. What is this feeling?! This sudden yearning?
Our protagonist keeps doing Evil but as each day goes by, he starts to detest His own actions...asking "Why? Why must I kill other humans? Why must I cause blood to flow? Why am I feeling awful about it?" His erm...evil buddies start to notice a change coz his fighting skills drop dramatically and loses confidence in his missions. "Ok, time to 'recharge' him," one of them says.
"Hey, protagonist, we noticed that you're getting weaker lately. Come with us, we want to help you become the strong warrior you were before." [Brainwash, anyone?] Protagonist gets an sudden "spiritual" alert and runs!
"Oh no! Why am I running? What am I doing? I just heard a small voice in my mind say, "Run, run! Quickly get away!" This is crazy but I just don't want to go back to my old self. I can't. I've got to know who I'm supposed to be."
To be continued.
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.....I predict much struggles, angst and tribulation for this poor dud who's searching for his true identity. He fights to discover and find out his past, while fending off the bad ones. The evil kingdom is super peeved coz they just lost one of their 'best pieces.' "Evil Boss/Lord storms "Find him find him!!!! Find him before the Holy one does!" Of course, you all already know the ending. It's biblical.
It's the "journey" that's gonna be the story in a fantasy type setting.
What does everyone think? Is it Christian enough now?