MArcomage

"feels" a bit weak to me, compared with clay pit...
You should only have such an uncommon in your deck, when you need bricks... but in that case, your quarry should normally be above the other facilities... so a bricks x2 might even give you more bricks, remaining the other facilities "at work".

It is a bit like conjurer compared with lake fairy in a nature deck. But even here, the conjurer gives something, the fairy can't: mage tokens and wall+3.

what about: bricks x3 other facs x0?!

In fact, this card should be something which could be add usefull bricks in decks which are not focused on quarry, like nature ones (Apocalyptic Rain... These decks are more focused on magic and dungeons) or other decks which does not add much Quarry but need sometimes a hunger amount. Yes, it's quite based on the situation (And conjurer is more important in mage decks for the token raise with low magic). Maybe make it:

Bricks: +N+5
Production x0
N: #Facilitys ?