This might be the best pinger of all time. Also, it's monoblue burn. OP, especially in this set.

Its not the best pinger of all time, it only deals to creatures.

I don't take it back.

Compare to Mogg Fanatic and Icatian Javelineers, both of which had the heck played out of them, neither of which targeted the opponent all that often.

"had" the heck played out of them. One damage a turn cycle on a 0/1 doesn't seem so powerful to me. Would you like an activation cost on it? Or a bump in casting cost?

This is crazily good. Prodigal Pyromancer is so good because he can hit creatures. Cinder Pyromancer was nowhere near as good. Problem is, it'd still be too good at 2 mana, but at 3 it's worse than Prodigal Sorcerer and I assume you wouldn't want to make this 1/2. (I'm also assuming you wouldn't want to move this over to red where it should go.)

One solution: take the Stonybrook Angler approach. Charge some mana on the activation. That'd make it like Stinging Barrier. Total of 3 mana between the cost and activation is probably about right.

­ cost to activate and make it to cast?

Yeah, if you're intent on having a cheap blue pinger, that sounds like a plausible set of costs for it.

I disagree with the color on this. It would be sensible to make the activation cost at least red. But ignoring that...

Repeatable removal doesn't belong at common. This is as clear an uncommon as they get.

Activation to Red seems fine.

Maybe a 0/1 to keep it as a common? Or 1R cost?