Hmm . . . now it may actually be pretty underpowered. Compare it to the existing card poison and you'll see that this costs a lot more to play, and it uses up a creature slot.
It does have the advantage of not being effected by purify, but really, that card is very rarely used.
Poison can be affected by purify, as in this case, shock damage cannot be changed with purify. In fact, originally this was supposed to increase when purified, due to the basic science that water plus electricity is equal to ouch. So this isn't really overpowered, because 3x6=18 permanent damage for the game. That's the equivalent to an immortal crimson dragon and mortal flesh spider for the entire game. As for poison, 6x3=18 that can be removed with 1 card. Yes, I know, purify is not used commonly. But, on the other hand, it can be the difference between life or death.
I don't think it's necessarily bad to have a card that affects the opponent while it's still in your hand, I just wasn't certain if it should be immune to shields while at the same time there's no way for your opponent to affect the card.
Zanzarino said specifically that he wants the cards in the players hands the only 'safe' cards in the game. Thus, it would not be fair to create a card that can do damage. Zanzarino does not want a card that can affect the game while its still in the players hand, so the previously model would
not have worked. My point? Well, this card is balanced with poison, because 1 wasted creature slot for permanent 3 damage, or 3 damage that can be stopped with 1 card. Maybe the price could be nerfed down slightly, but I think this card is just fine. Maybe it would be better as 4 not upgraded, 5 upgraded.
