We were confused about about statute. It says you gain a victory point for every gray building in your empire. Does it mean when you play it? Or does it give you a point every time you play a new one?
This is a one time bonus. The card that gives this bonus is probably grey so it also count.
The cards that give bonus every time would have this text: "each time you build grey building gain 1 vp".
Also for a foundation can I use a card from my hand? Like I use a raise token to raise a card in my hand. Can that be a foundation? Or does it have to be in play already?
The foundation can't be from your hand. It must be a card that you have built (that a opponent could have raze or not).