"Ha! You wish it would just be that easy! But... hmm, maybe I can almost accommodate you..."
He lifted the blade and advanced on her ass...
***
Many hours later, he watched as her body repaired itself completely, waiting for her to awaken again.
He had sliced and diced her, starting at her ass and working up, the knife inside her, until she died. He had then sliced and diced everything he could see, but not cutting anything off, to see how long it would take her to rejuvenate.