The prophecy contains the history of the first Game (Divine Divinity) and "Child of Chaos" the back story of Beyond Divinity. There is no mentioning of the Source, since Source was introduced in Divinity: Original Sin, but they explain what the Council of Seven and the Lord of Chaos is.
That's not true, though. I've already mentioned that one of the first quests in DD was related to the Source and I think even the main quest's objective was to find the reason why the Source is blocked.
We've already seen that the Source has healing magic and I don't think that's bad :p We need a better understanding of the motivations of our villains.
