Another detail I missed was Valta's insisting the stone preceded the Titans- gave birth to them- so there goes my creation myth- or at least my earth-creation myth. When the huge lyrium veins are first seen and everyone reacts to it, they speculate about how it's remained intact despite the Sha-Brytol mining it for use in their armor, and Valta says, "Unless they found a way to harness it." We already know lyrium is alive- so it probably grows- but maybe there's something more to it? Like there's some sort of fertilizer or something? Like that huge underground sea. Then it would be more of a renewable resource, unlike oil, so I don't have to get all conservationist about it, other than establishing regulatory laws to prevent over-mining. I'll convince Bhelen to do it! Don't make me!
With the way things are going, I wouldn't be surprised if
dwarves were the fertilizer, given... everything. Solas's severed arm comment, everything we learned in Descent, the ambiguous and sort of ominous translation of
Mathas gar na fornent pa tot isatunoll from Leliana/Tug, the fact that only the non-casteless strengthen the Stone in death (when they're entombed)...
Just watch. Solas rips open the Veil and dwarves are MiracleGro.

*removes tinfoil hat*