That's cool I never noticed the spark before
Anyways, I feel like this card should be OP with 5 damage for 1 
but at the same time, it just doesn't feel
OP...anyone wanna explain why it is/isn't overpowered?
As far as CC goes, it's the strongest single-target one in most metas. War being the most notable one. For a more direct comparison, you should compare this to Gravity Pull and Basilisk Blood: the other two very strong single-target CC spells.
GP has the downside of slowing down your own offence, but it can kill -anything-. Unfortunately the latter point is normally useless as what you want to kill rarely has much HP. Most high attackers are fragile, and most Dragons only have 5 HP (which is why Shockwave is a lot less relevant in the likes of War, by the by). The caveat of needing attackers is another huge one, because stalls normally do not run much of that.
BB stops -anything- for a whopping 6 turns. Of course, it doesn't die. That's an obvious huge downside.
The three bolts (includes Drain Life) have more utility, and thus stalls can be built around them, but Lightning deals the most damage for such a very low cost, which makes it practical in Bone Wall decks and all kinds of stalls. These decks need a fast response to a fast meta where you have to deal with a first turn Golem or a second/third turn Shrieker/Dragon. If you don't have the quanta, you're in big trouble, so 2
is just the ticket.
Why isn't it OP? Mostly because there are a few things that stop a rush even harder.
A few examples, with Pandemonium being the one closest at hand. For 3
, you're going to deal, on average, 3.2 damage to every creature on the board. That's more than Rain of Fire for a cost that's only 1 more than Lightning. As for the perms.. they can be stopped, which is a plus for Lightning, but they remain the biggest obstacles for an offence-oriented deck. You need PC in most metas to get anywhere because perms are so very powerful. Add Sanctuary to any of the examples I've given and you have a few well used stalls. Lightning has another thing going for it too though: it's in the same element as Dim Shield.
In the end, Lightning is the most used (and thus probably the most practical) single-target CC in the game, but it's still only single-target and you can still only pack 6 of them. Some say it's still OP and would like a cost increase of 1
. To be honest, it wouldn't have much of an effect outside of Pendulum-Nova rushbows, and it's not impossible it deserves it since it hits the sweet spot of 5 HP.
In the upped meta it's not quite as common because most Dragons get more HP, but it remains very key in stopping decks that are now even faster. I wouldn't call it anywhere near OP in the upped meta regardless.
