This seems like a more aggressive version of Phantom Militia, which I already didn’t like that much. Most of the slower decks, so the decks that could take advantage of being able to play it 3 times on Turn 9, would prefer the 2/4 Taunts over the 3/3’s. On the other hand, faster decks like Aggro or Midrange builds would rather play a stronger on-curve play than a vanilla 3/3. Yes, it’s playable, but it won’t likely win you games. On Turn 3 you want to push the tempo (…push the tempo, push the tempo), and on Turn 6 you want to look for a way to close out the game, and 2x 3/3 minion is definitely not it (I mean, Hunter has 2x 3/3 for 5 mana with the basic version of Lesser Emerald Spellstone and it’s bad until you upgrade it).
It’s an easy card to understand the Echo mechanic, but it doesn’t look good in Constructed – it’s a pack filler.
The only thing I like about it is the art! It looks so wacky. While I enjoy the beautiful art of some MTG or Gwent cards, the art in Hearthstone is great for a whole different reason.