造幣所
You may reveal a Treasure card from your hand. Gain a copy of it.
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When you buy this, trash all Treasures you have in play.
Mint is an Action card from Prosperity. When played, it lets you gain a copy of a Treasure card that you have in your hand; when bought, it forces you to trash all the Treasures that were in play when you bought it. Buying a Mint can therefore be effective for clearing out early Coppers.