The Demon Who Couldn't Lie
"Trade in your soul now. What do you want? Money? I have bags of it! Good looks? No problem. Need healing? I can provide you with a miracle. Anything you desire for the rock bottom price of eternal damnation."
"You want to buy a soul? Sorry, demons don't have souls."
"Have I any human souls? Sorry, I have none in stock."
"Why not? Well I'm the demon who cannot lie and no-one will sell me one."