the 7 Eternal Lords betrayed their king, used the Source power of the Veil for their own and decided to reshape the world so that they could play being gods.
And to do that they had to cast every other Eternal to the void.
The king (who now calls himself the God King) has been trying to return to the world again and again; something the 7 fear most of all.
The only thing capable of holding him at bay is a divine being of tremendous power, greater than that of any of the 7. Since none of them would trust another with that power, they decided to give it to a mortal champion instead. One that was born into one of the new races they themselves created. One Divine that is ultimately meant to die and release that power once more.
And the gods are willing to let this fight between the God King and the Divine, this fight of Void against Source, go on and on forever. This is crucial to them.
And then there was Lucian, who decided to break the circle. And for that he needs to collect all the source in the world, including the gods'. That's where the magisters come into play. Lucian does not want to see the Eternals returned however (we can clearly see that the voidlings have no love for these 'newcomer' races)
However, with the God King getting again closer into breaching the void, the Gods have started to train a new generation of Godwoken, one of whom must become the new Divine.
