So ever since we found out that her red thread magic could change the fate of someone, I've wondered if it could not only save someone from death, but also instantly kill someone. And that may sound broken as hell, but what if it was like a sacrificial thing, where it doesn't just use up her mana, it uses up her whole life. I kind of got this idea from Fairy Tail, when Lucy broke Aquarius's spirit key and it was super emotional because for her to make her ultimate summon, she had to make that sacrifice. I also was thinking of Might Guy with the 8th Gate. Anyway like I said, it could be a super emotional scene for Vanessa and there could be a fuck ton of flashbacks in it, and in the end, she makes this ultimate sacrifice to beat some ridiculously strong enemy by cutting "The Red Thread of Fate."