Am I the only one who thinks there should be another upside (besides the intel upperhand) to Maestra? Something like "neutral cards have +1/+1 while you don't reveal yourself"? I love this style of cards, like I love Renounce Darkness but find that there is no real reason to play it.
Only for the achievements
Wouldn't this also reveal yourself though? Perhaps "Battlecry: Upgrade your hero power"? I don't think having a delayed 2/2 weapon would break anything (certainly not in this meta)
I would have liked her to be a copy of a legendary of that class, like Lady Prestor does for dragons, but upgrading the hero power works too. This card is infinitely interesting and really utilizes hearthstone's digital nature cleverly, but it is nothing more than a cute gimmick. If it just had ANYTHING USEFUL as a battlecry or something, we might have had something.