MArcomage

If not used with Shelter, how does this work? If I discarded just one card last turn, does my hand fill with nothing but that card? Or does one of my cards get replaced by that discarded card?

The latter is less abusable, so I guess it's what you meant. But if so, then I think the text needs to change to make this fact clear.

I think it should only replace New cards with cards that had been discarded during the player's turn, only one replacement per occurrence in the Discard pile. It will still work as designed with Shelter and be less chaotic at other times. (Also, no playing a bunch of Quick cards, discarding Prosperity, and replacing all the New ones with several Prosperity.)

Alternately, it could be written to only work if last card played was Shelter.

Actually I like that last idea, DPsycho. Card amended.

I'm not sure about the utility of this card (combo). shouldn't it give some wall or something?

Current incarnation has no effect if last card wasn't shelter. But I'd put it in my deck the way it is now without a thought; it's a free chance at drawing an uncommon for a turn.

It needs a cost of some kind. Even if it's just -1 random resource.

Good point. You could even make it an Else statement so it doesn't happen if you're using the card the way it's intended. That being the case, the penalty could be something more severe than a random resource. One or more stock or nominal tower reduction could keep this out of decks that would use it just to fill a Common slot.

Added "-1 Stock" effect to the card.