Not sure what you mean by one of them assimilated with us. Also not sure what domesticated infected died.
Alright, guys. Should we asplode the cube and make our appearance? We aren't in such dire need of belief anymore, so it might be better to reabsorb the artifact's essence and just explode the physical cube. That way we can put the essence in a new cube later.
Also not sure if we should go for the shelled whales - they might be an important food resource, plus they probably need a lot of food. Probably best to make them smaller if we can. They can give us a nice max of 1000 belief a turn. We have control of the local fish population, and can make them do all the dirty work, from fetching food to moving supplies, and maybe even making underwater temples. That should leave our underwater children with plenty of time to worship us, be fruitful, and multiply. Probably best to keep them away from the shore too, so as to avoid losing them to fishermen.
All the landlubbers should think we were born from the infected's wish for transformation. Their new insanity should be a warm, cheery attitude. A sort of optimism. After all, those who predict a bright future must be suffering from some sort of delusion. A sense of pride should also be present.
I also like the idea of blaming the disease on the Shadow. It'll make that guy seem mad/suicidal, increasing the chances that Valahun will glory-hog and solo against the Shadow. There's a small chance, though, that they're already the same being, whether because the Shadow already consumed Valahun or because they were always the same. That'll suck.