... I see. { She needn't continue. He's much more familiar with that kind of dynamic than he'd like to be. }

There are several people here with the ability to 'purify' things, but I'll admit that this is the first time I've ever heard of anything like a 'soul gem.' This is quite outside of my field of expertise. I don't know if their abilities would be able to help you, but if it truly is that dire of a situation, it can't hurt to try.