One of the best payoffs for the brown decks in Cube, Urza is an incredible reason to draft artifacts in Cube
Exxaxl: Her instant card, Ashnods Intervention doesnt generate mana or sacrifice creatures or anything like that related to Ashnods Altar either
Marcy: This does certainly have 'win-more' potential and issues, and also costs 5 mana, which means that in a format like Standard, that's a point of the game where you should probably just be winning, but if there were some way to get this down earlier or cheated out, could be good
(If a permanent with a stun counter would become untapped, remove one from it instead.) III Diamond Dust Draw a card for each tapped creature your opponents control.
Its not that far off from Amazon and a little more official than selling through something like Facebook Marketplace
How to play it : Use Shift to land her early after a smaller Tink for immediate value