Hey goko! I thought of some great online-only promos:
Lightning Rod: $5, Action
Trash any number of cards from your hand.
At the start of your next game, +1 zap.
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This card is not returned to your deck at the end of the game.
Owl: $5, Action
+1 Buy
+$2
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While this is in play, when you buy gokoins, you may overpay by up to $5. For each $ you overpaid, each other player gains a curse.