MArcomage

This is a really cool idea, but I feel it might be game-changingly good in the amount of control it gives you over your resources.

yes indeed thats why its rare, i believe it would give about the same sort of advantage as a lotus or prosperity? however i have made an uncommon version of this where you lose stock everytime you "trade resources" you can't depend on getting a rare that can't be summoned so.

You realize of course that once you get this card if you have 10 of each resource it's instant resource victory right?

How do you figure? It's Quick, so you're not generating any production while you use it. You end each play of it with the same total resources as when you began, you've just moved 4 into a different place.