We follow rules      

Angels. Demons. God. Me. We follow rules.
"Prayers? His job." I pointed up. "I do deals." The kid nodded. Kevin Parker. Killed 173 people involving torture, rape, arson. Kid's got style. "What do you want?"
"I'm...bored. I need...inspiration. Someone like you, could help me. Give me something to work towards. My...grand finale." Kid's got vision.
I considered. He'd done well, but could do more.
"I want your knowledge. Your...soul." He said. "Not...forever of course. Just...for a bit. To see what you see. Souls have memory." Kid's got smarts.
"What do I get? Usual deal is your soul, but your's is already dark."
"There's deathbed confessions," he smirked. Taunting me? Kid's got balls.
But he is right. Those do....work.....
"What the hell?" I say. Smiling, I reach out my hand. "Your soul forever for one day of mine. My soul's all yours."
He beams, accepting my handshake. A tingle passes as souls swap.
He recoils, jumps up, staggers out of the bar. Eons of evil memories hit him instantly. I close my eyes, imagining what he'll do, who he'll hurt. I can't hurt people directly, but this way...I'm involved. I sit for hours, fantasizing, sipping my drink, letting warmth course through me....warmth....
I jerk up in agony. Warmth turns to pain. No...nothing is ALLOWED to hurt me. Time slows, pain increases. Focusing my energy, I shift to him.
He's sitting alone in a cheap hotel room, holding a gun. Through pain, I see him speaking, but it takes time to focus. Is he....praying?
He looks up, smiles, winks.
"If I die before I wake...." Gun goes to his head. No...
"I pray the Lord MY soul to take!"
*bang*