Debasement ($5)
Action-Attack
+$2
Each other player reveals a treasure from his hand costing from $2 to $5, and puts it on his deck (or reveals a hand with no such cards). Then each other player gains Coppers into his hand until he has 6 cards in hand.
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Here I use "debasement" in terms of currency; ie, the lowering in quality of a coin.
Although it has an immediate effect on opponents' hands, oftentimes it won't negatively affect their next play. It usually targets Silvers, Bureaucrat-ing them and replacing them with two coppers. If the attack "misses" a $2-5 treasure, then it actually adds $1 to the opponent's hand. If the opponent has previously been the victim of a hand-reducing attack, Debasement might actually give them $3 on their next turn (but gum up their deck with a whopping 3 coppers). I guess this will be stronger against special treasures like Venture, Loan, Fools Gold, and Quarry, as the delay of their use can be more hurtful than the delay of a silver.