Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for 1.)
So this new ability was spoiled along with the card Battle at the Bridge. I have no delusions that Battle at the Bridge will be playable, however I am curious about this ability. Besides the overly flavorful way they wrote it out, it seems like turning every single artifact you have into a mox could be powerful, but at the same time you are already running moxen so it really does not do much for decks where those are the only artifacts. The obvious deck where you would think to play something like this is shops, but it does not help with colored mana costs so thats an issue.
I suspect in legacy this is going to be a hit in affinity decks provided we get something they can use (thoughtcast 5-8 perhaps), but is the ability strong enough for vintage or just redundant with decks running moxen already?