When I first saw this card I thought it was too situational to really be useful. Then I realized it can be a nice way to get King of Dale out on the first turn if you aren't running two Spirit heroes in your deck. All you need is a 1-cost attachment, something like Hauberk of Mail or Map of Rhovanion. I find that Dale decks can struggle on their first turn or so when they haven't had the chance to get their allies out yet, so anything that makes it easier to get your engine going as fast as possible is certainly welcome. Not to mention that thanks to Brand son of Bain you've also drawn two cards as well.
Planning Action: Choose a ready player attachment on a character you control. Return that attachment to its owner’s hand to reduce the cost of the next attachment played this phase by X, where is the chosen attachment’s cost.
The Wilds of Rhovanion #15. Lore.