Yeah... pirates are awfully cheap. This seems way too powerful at 3 mana. Easy triggers (including backstab & prep for this spell) to turn this into a hand refill for an aggro pirate. Getcher Golakka's fired up!
Amm, I remember how some rogue players tried to make an aggressive version of their Kingsbane decks. Arcane Intellect was a widely used draw spell, this has potential too. The real question is - will the pirates be good enough?
 This could also be a hint, that rogue gets yet another weapon.
[edit 2] Ah yeah, I was thinking about saying it. Odd-cost card. This could be strong in odd rogue, because it will give them more juice. They were obligated to cut Elven Minstrel anyway, so this is a body-less draw for them.