What are the conditions of this wish?

"The conditions of this wish?" She said, her tail behind her entwining around her small frame.

"Why that's a strange question!" She said, with a bit of a smile. "Few people have thought to ask that one!" Her hair flowed in what seemed a weightless space, defying gravity. I stood in awe of her raw beauty, possibly captivated because of her powerful aura which seemed to lure me in.

"Well, we get power by getting energy. And you see," She continued pointing at me. "Your soul is so full of energy, all I ask for the invocation of a wish is a portion of your soul. I can bring so much to you."

... Wait... "A portion of my soul?" I asked, in shock. "You expect me to hand that over?"

"It's just a teeny piece. It can't hurt you THAT bad. It's not like you're an ancient soul with dozens of powers you don't know. You're just an average boy right? And besides, for all you know this is a dream! So why don't you give in and give it a try." She said with a very seductive voice.

This was insane! ... I still haven't any clue what to make of the situation... But it probably is still a dream...