The weapon alone is easily 6 mana worth, possibly 7. Armor is worth 1 mana so that together is almost 8 already. The hero power is GOOD. Not as good as some others, but better than the basic hero powers. I say this will spawn a new, viable midrange/ control warrior. Will it be the best of the bunch? No idea. But it could be.
Unplayable, Warrior doesn't need board control it needs value, your opponent is just going to look at you like you're stupid while he takes you into fatigue, only plays one minion at a time or destroys your weapon and laughs - the card is literally worse than Gorehowl, my god that is awful.