Signet
2$ Treasure-Reaction
Worth 2$
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When you gain a card, you may reveal this from your hand. If you gain a card while this is in play, you must reveal this from play. If you do reveal this, put the gained card on your Signet mat.
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Whenever you shuffle, move the contents of the Signet mat to your discard pile.
Signet - Treasure - Reaction - 2$
Worth 2$
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Whenever you gain a card, you may reveal this from your hand. If you did, or if it's in play, set aside the gained card and discard it when you shuffle your deck.
EDIT: Used silverspawn's improved wording.