A 2 mana minion with a battlecry that requires spending mana on other cards or the hero power in order to do anything. And since it is even cost, it can't be used in an Odd Druid deck. I suppose it could be used with Bite in the mid to late game to remove stuff, but with the current Druid core cards, it probably won't see much play (due to lack of space in druid decks to fit both Bite and this) until the rotation happens.
Medivh's Valet can deal face damage. And if you still care about having a card that deals 3 damage to a minion past playing the DK, you might as well use Wrath which can also be used beforehand, and has extra flexibility.
Really good arena card. A 2/3 on turn 2 is solid. If you can combo with Bite or Claw later in the game, the value is crazy. Most of the time, it will be a vanilla 2/3 that maybe does 1 damage on Battlecry, but a 2/3 in arena is still pretty good.
Will see absolutely no play in Standard Druid. It could see play if Even Druid becomes a decent archetype.
I don't see this battle cry making much of an impact, unless they're making more hero atk buff cards like claw and bite. in a malfurian twig deck you do 4 damage, otherwise your doing one damage without claw or bite use. Will this make a feral druid themed deck ?.