The gold standard in hero readying ever since the core set, and one of the reasons blue is so damn strong. It's a similar situation to Steward of Gondor, where they painted themselves into a corner with such a broadly useful card, and the more interesting alternatives just aren't as good usually. You also only get one copy in the core set (thanks FFG,) which means it's proxy time. Remember kids, a standard card is 2.5 by 3.5 inches, and Keeping Count makes a great backing material.
Attach to a hero.
Action: Exhaust Unexpected Courage to ready attached hero.
you are fat and lazy.
You cannot trap me, though you try,
in your cobwebs crazy."
Bilbo Baggins, The Hobbit
Core Set #57. Spirit.
This is undoubtedly one of the greatest cards from the core set and the reason, why people usually buy another core set, however I still think to have only one copy of this makes the game more interesting and challenging and when this comes to hand it's like a Christmas. Extra advantage which makes your play a little bit easier and I think it should stay that way. 3 copies would make this card less special and also the whole game less challenging. But that's just me. Really nice artwork also. verdict: 5/5.