Laurel Wreath
Treasure-Reaction
$4
Discard up to 4 cards. +$1 for each card you discard this way.
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When you discard a card from your hand other than during clean up, you may reveal this from your hand. If you do, either trash that card, or put it on top of your deck.
Note that the card has to be in your hand for you to reveal it, and when you discard more than one card at once they are discarded simultaneously. This means that you can't trash your hand when you play a Minion.
I think similar ideas have been thrown around, but I think the two contradictory ideas work together to limit the swinginess of either effect. The top half is good in bad decks, but the bottom half helps improve your deck if you have an enabling card (many of which exist). It can combo with sifters to really trash a lot of cards, but then you'll end up with 2 mostly dead cards (this and the sifter). The discard has to be from hand or else things like Golem can be used to trash or rearrange your whole deck.
EDIT: Changed it so it isn't uber powerful to get many copies in big drawing engines. It also self synergises now, which is cool.