I guess that with the advent of Grimbeorn the Old this card got some new life. Sure there is already Beorn's Rage to use but it's limited to one enemy (and does not work on immune ones), whereas if you include some reading for Grimbeorn (like Rohan Warhorse) this card can give him a buff for both attacks/defenses.

I used to use this card, but now I do it very rarely. Simply put... there is so much other better choices which to use in the deck. this is like a standart event card which you can find in any card game and even the artwork looks more like robin hood. Verdict: 2/5.

Blade Mastery is kind of meh. Way back when, it was alright, but now? Meh. T Boromir and Vigilant Dunadan are about the only cards I can think of that synergize with this, and even then; there are so many better options.