Idea:
A consumable that allows players to forge weapons when an arsenal station is not available. For example, it could be used in the middle of an FSC run, so players could forge without returning to Haven. It could have durations like heat amplifiers (2, 7 or 30 days), or be a single-use consumable.
I think this type of consumable would be more useful and appealing than heat amplifiers. Assuming it is not too expensive, I would definitely use something like this.
I think it would be good as well. Also lets you forge if you got a bunch of heat in a level but needed just a handful of crystals.