Here's an idea that came out of modifying my Peddler variant from the rinkworks competition.
Tax Collector
$4 -- Action -- Attack
If you reveal and discard an Estate from your hand, each other player must discard a Treasure or reveal a hand with no Treasure.
+1 Card, +1 Action, +$1
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Initially, I had the card reveal and discard a Province and it cost more, but that was deemed too weak by the community. In modifying the card, my goal is to make the card into an attack that is sometimes better than Cutpurse (worse for the opponent), but most of the time worse (better for the opponent). The matching with Estates to "activate" the attack sort of limits the power.
Any comments/ suggestions?