What is the result of the Magnum Opus called?

I've heard the name that is the Philosopher's Stone, but I was wondering if there was a single word or perhaps even an adjective that could be used to convey the same thing? I have a DnD campaign that I'm co-DMing and there's a layer of the Abyss that's trying to have someone perform the Magnum Opus on itself so that it can destroy the Gods