[He could sense the shift right down to his demonic instincts. This was a world that was made for only the two for the two of them. It was rather impressive that she was capable of this much even when had he had her weakened. That willpower of hers was something that he should not underestimate.]

As I said, I want power from you. A spell, weapon, knowledge... You have lived for a very long time, so you should have something useful for me.

But in exchange...

[He leans into her ear to whisper.]

I will give you an eternity of ecstasy. Time flows differently in this world, doesn't it?