"Take that negative energy and use it as fuel to go further!"
Yeah, you can do that. Alchemy on the soul does work, but there's a price. There's always a price..

If you give any weight to the countless stories told, you'd be careful on how you rely on this dark energy for your goals. Be careful with the container, don't let it break.

Doing business not because the other party has what you want, but because they are aligned with your values is a completely different experience.