Speaking of goldmines, I don’t think that they actually function as per the card description (I’ve used them to win so many times now, it’s actually shocking I didn’t notice this before).
The card text states “Gain 3 of a chosen resource for each resource card in your deck. Currently: 13”
I have a deck with 10 resource cards (The 4 original scorium, 5 ore + 1 additional ore I bought at the last shop). When I played the goldmine on an ore, I received +13 additional ore. So while that “Currently: 13” number is consistent, I’m not receiving 3 * 13, and I’m not sure where the 13 is coming from to begin with.