Alright, here's my entry:
Tarnished Cards
The Tarnished Cards replace the Curse cards in a game using a card with the subtype "Tarnisher" (or any time you want to replace the curses). There are 5 different Tarnished cards, and there are 10 of each. They are set up exactly like the Ruins pile.
Tarnished Blade Cost $0
+1 Action
Trash a card costing at least $3 from your hand to trash this card.
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When you trash this, if it was not in play, put it into your hand.
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Worth -1 VP
Action - Curse
Tarnished Armor Cost $0
+1 Action
Discard 2 cards to trash this card.
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When you trash this, if it was not in play, put it into your hand.
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Worth -1 VP
Action - Curse
Tarnished Fortune Cost $0
Reveal cards from the top of your deck until you reveal a Victory or Curse card. Put that card on top of your deck and discard the rest to trash this card.
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When you trash this, if it was not in play, put it into your hand.
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Worth -1 VP
Action - Curse
Tarnished Gift Cost $0
+1 Action
Gain a Copper to the top of your deck to trash this card.
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When you trash this, if it was not in play, put it into your hand.
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Worth -1 VP
Action - Curse
Tarnished Maps Cost $0
+1 Action
The player to your left looks at the top 3 cards of your deck, discards any number of them, and puts the rest back in any order. If they do, trash this card.
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When you trash this, if it was not in play, put it into your hand.
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Worth -1 VP
Action - Curse
And here’s an example of a Tarnisher card:
Corrosion Cost $5
+2 Coffers
Set this card aside.
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When another copy of Corrosion comes into play, discard this, and each other player gains a Curse.
Action - Attack - Tarnisher