Interesting, though it seems like it would be too good if the Kingdom consists of only one or two expansions (if it's only a single expansion, this could be purchased for $1 and would grant 1 VP because it is a card from a kingdom supply), at two expansions, it cost $2 and you only need one other kingdom card to get it to 2 VP.
Is that really too good? If Estate cost $1, would you buy them more often? I don't know how often there's only one or two expansions represented in a kingdom, anyways.
I'd think it's more likely that there'd be 4, 5, or 6 expansions represented, in which case it starts getting into the same range as Fairgrounds. (Fairgrounds looks a lot weaker in comparison until you remember that Fairgrounds gets to count your Copper/Silver/Gold/Estate/Duchy/Province.)
And maybe you get to play one crazy game where these are worth more than colonies, but even then, they're only a point more, and they still cost $11.
Do Walled Village, Governor, Black Market, etc. count as being from a single promo expansion or are they each considered their own expansions?
As written, they'd count separately, because this card looks for expansion
symbols, and they have different symbols.
I think it needs a bump in price and/or a VP to expansion symbol ratio other than 1 to 1.
I don't think it would be printable with a different ratio; it'd be too complex to be worth the effort.