This new design for the card, discarding a selected card from enemy hand and dealing damage based on its cost, strikes me as a good suggestion. It gives you the Brigand attack you wanted while fitting the motif. Being Durable (and Rare, such that there's only one Banish card that can discard it), the cost makes sense. However, without looking through the existing cards myself, I can't help but wonder how many non-rares have a high enough cost to be worth the 25 recruits to play this. Actually, I think I will check.
Edit: I count 64 Uncommons with a total cost of 20 or more. I withdraw my concern, there would be plenty of opportunity to play this for decent effect. I like it.