Are there any non-supply cards besides Black Market?

Question

According to the designer of Dominion, Donald X. Vaccarino:

Bridge makes all cards cheaper, not just ones in the supply. This was to prevent problems in weird situations. I am not sure the kind of thing you'd need to get those problems will ever happen, but I knew that this way of doing it meant I was safe. This also allows some unusual combos to work.

Which non-supply cards does he refer to? The only example I can think of is the Black Market.

Answer 1

All cards not in the supply could include:

• Cards in your hand
• Cards in your opponents hand
• Cards in play (including opponents)
• Cards in your deck
• Cards in your opponents deck
• Cards in your discard pile
• Cards in your opponents pile.
• Cards in other locations (ie Village Mat)
• etc.

Example Play from Intrigue cards:

Play a two Mining Villages, play two Bridges, play a Swindler. Opponent turns over an Estate which is now valued at $0, replace opponent's Estate with a Curse.