Suggestions for weight transfer (not just loss) spell?

So I’ve read over the weight-loss spell threads, but someone not on BALG suggest I do more.

I am a thick girl working on losing weight (I’m eating healthy and will be exercising again when I’ve recovered enough from a nasty injury).

My stalker/harasser/bane of my existence is a scrawny little bitch troll and happens to be an extremely vain narcissist.

Anyway, a new friend suggested I come up with a spell to transfer my extra pounds to Bitchtroll’s twiggy frame.

I’m looking for ideas to adapt this spell - what do you all think? Drip some of the yellow candle wax on a picture of Bitchtroll? Ask Belial for help?