Militia is okay, but there allready are many of that. Militia, Urchin, Mercenary, Torturer, Goons... Not even counting Cutpurse, Pillage and Ghost Ship here.
Also it's very close to the original, i feel it lacks the bit of "Specialness". I might be wrong, but i'd like the Copper-giving a bit more, as it isn't there nearly as often yet. What do you think about a combination where the discard works as the "bane"?
Charter
5$, Treasure - Attack
When you play this, each other player mit 4 or more cards in hand chooses one: He discards a Copper; or he gains a Copper may discard a Copper. If he does not, he gains a Copper.
Edit: Fixed wording mistake.