The best word I have for this is: ehhhhh. Yeah, it's nice to have Shock on a stick. Yeah, it's nice that it's colourless. But, it's really expensive. For 3 mana, 2 damage isn't really worth it. I'll admit that it's not as bad as Aladdin's Ring, but there are better cards out there. Leonin Bladetrap is an example of a better card for instance. But you're comparing uncommons to commons!!! Okay then, Perilous Myr. That's a much better common that does the same thing, cheaper and with more benefits.
Pros: Colourless Shock