Source Lore in Divinity Original Sin 2
Source is the world energy of Rivellon, from which magic is born. First known to be harnessed by the eternals, the precursor race to the seven races: dwarves, elves, imps, lizards, humans, orcs and wizards. When the Seven Gods rose against their eternal brethren, Source was released into the wider world and as part of this, embedded into the seven races the Gods created as conduit to maintain the supply of Source feeding both The Gods power and the veil. As to if the eternals were the first to wield Source, there is no certainty, with some considering dragons to have been the first. Although generally invisible to the naked eye, powerful Sourcerers have the ability to see Source itself and in certain locations it may manifest itself in crystal or orb form.
The benefits and dangers have swayed the perception of Source over the aeons: in Anno Rivellonis Source allowed Sourcerers to ascend to the height of power in society, in Anno Draconis it was a tool for healing. Braccus Rex is one such notable ruler who became twisted during his rule, and Mardaneus was a notable healer among those in Aleroth.
