There is already a card called Hesitation. Actually, it's kind of similar to what you've suggested here. Also, there already exists Spiketail Hatchling, which has the exact same ability, but comes attached to a 1/1 flying body and costs
instead. Certainly a new name is in order, but I'm not positive that this card has a niche into which it can fit, given the existence of those two cards. It's worth discussing, anyhow.
Other than that, I really have no complaints about this card. It certainly isn't too potent. On the other hand, it's kind of neat, since it can add a kick to any other mana payment soft counter. Obviously, Force Spike could do the same thing, but it required additional investment of mana to do so. Laying this down first turn has clear advantages over Spiketail Hatchling, in many situations. It better helps to prevent first turn plays, since it comes down faster It bears mentioning that it generally fits the mana curve better. I've noticed that Mono-U control tends to have a glut of spells with converted mana cost of 2. Beyond the first turn, I'm wary that this really does not fulfil any function that Spiketail Hatchling does not (besides being cheaper.)
