Whoa
Well. A great deal seems to have happened in my abscence. I think I'll start with the seers information.
As Forrester has clearly stated, Vecna is not going to be able to summon the Elder Ones. However, I think we can expect him to begin the PROCESS of summoning them. This shouldn't be much of a threat - My own people attempted to summon the Elder Ones during the Torilian Wars and found it much harder than they had ever expected. They are difficult entities to wake.
As for his intentions to wake the City of the Gods? Well, bully for him. Once he wakes them up they'll destroy him and his armies without much difficulty... But then they'll come for us, specifically ME, and that's bad. So, you can expect us to move out of the Godspires to a more distant location. This location will not be secret.
I am not afraid of this disease. I can make allocations to cure it without much difficulty.
<< Edena, I am using Wish spells to create magical items that can Cure Disease at will once per round. These should fall within the price perameters - It's a powerful effect, but not quite so dramatic as Cure Light Wounds. I'll be using these to immunize my army from the effects of the Red Death - If necessary, I'll spend even more XP to make Heightened Cure Diseases that can deal with the more powerful, Vecna-enhanced disease. At the levels I'm at, 5,000 XP should be what, 1/6000th of what I need to go up a level? >>
However, I think we should be wary. As we have seen, these visions are so exaggerated that it's almost comical. My point is this:
I do not believe that Vecna has the capability to do what our visions show. I believe that he has created these visions as a bluff. I believe that he intends for us to send our forces against his forces and die in a horrible trap of some kind.