This is essentially what mirrors We Are Not Idle for Dwarves without the card draw and exhaust cost. It can be absolutely nuts mid to late game. Or just enough to help you grab an early King of Dale. Not to be underestimated.
Traffic from Dale
Planning Action: Choose a Dale hero you control. Add 1 resource to its pool for each character you control with a player attachment. You can only play 1 copy of Traffic from Dale each round.
The Hobbit
The Wilds of Rhovanion #12. Leadership.
This card is mental in a Dale deck. My first game playing a Dale deck I played two of these (number three was lost somewhere in the bottom of the deck) and gained 11 resources. Less the cost of the card, that’s a gain of 9 resources for two cards. (!)
Long story short, in the right deck this card is an awesome resource accelerator.
This card is the best resource generator for your Dale heroes, in my opinion it even tops the Steward when you’re playing with a Dale hero. This card can reliably generate at least 2 resources in the early game (if not more), which will allow you to purchase your big Defender or a strong Warrior. In the late game, Traffic from Dale can give at least 7 resources! (From my personal experience.) The only downside is that it’s not an attachment, though if it was, it would be too OP.