OK, so here’s my theory:
The Hand and Eye of Vecna are working with Riva City (well at least someone from the city/military), as we know they did with the weapons. Maybe the majority of the The 20 Sided Dias, or someone influentially high up doesn’t want to go to war with The Empire and the Hand and Eye are having none of that! I predict they have contaminated the grain that will be passed out to the millions of people who will be at Minnik Lora’s concert. Since she is a well known, outspoken enemy of the Empire, everyone will blame them for the attack…and voila, they have a war! And with soul-charged weapons to boot.
I stick with my previous theory, since the people of Riva City have heard that the Empire have been gracious enough to supply them with grain to accommodate all the extra people in the city, for the concert. So the Empire are already set up for the blame.
The bad dreams everyone’s been having in Riva City –
Who do we know who meddles with dreams? Felsa wants Kendall to take up her role as shaman, and the grain gone. Why? The bad dreams are being blamed on Melora, why? Some people are not having the dreams, I think Mouse called them “chosen” by the gods or something. Maybe it’s actually the grain giving people bad dreams and that’s why Felsa wants it stopped, it’s meddling within her realm! The “chosen people” could be the ones who orchestrated the whole thing and so have stayed away from the grain. We need to find out if the grain has been distributed yet.