Среди всего этого хтонического кошмара Георгий напоминает мне о Kevin из Cabin in the Woods.

Sadly gold/money is lucky to be able to fulfill the role of "mana" without breaknig player immersion. Spend military power on artillery barrage and people are rioting, use gold to magically summon a cathedral on a barely inhabited island on the other side of the world and nobody bats an eye.

Just the fact that the world loses a lot of its cohesion without a fog looks like a huge challenge.