Let's reword the card text a little, shall we?
Weak Mirror. Permanent, cost
![Light :light](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/light18x18.png)
Your opponent may now blow up his Unstable Gases.
Balanced, huh?
Before I continue this argument is about the unupped version; not the upped version of the card. I think the upped version is fine if compared to the solar shield.
I agree with xdude. No matter how little of a quantum cost it has it takes up a spot in your deck. How often are you glad you drew this card? Most of the time you are playing a deck lacking in spell based elemental damage (bolts, UG, lightning). In those cases (nearly every game) you will have wished you drew a different card, or put a different one in your deck.
The reflective shield will only be worth the spot in your deck if you know what your opponent will bring, but this is not the case in PvP (cards are/should be balanced based on PvP performance).
If more people decide to use spell based elemental damage this card would become worth putting in your deck. However, despite the unpopularity of this card spell based elemental damage is uncommon. How many firestall and UG decks do you see in PvP? Personally I have seen only one in dozens of games. This card needs some sort of buff in order to become worth the spot in your deck it takes.
So what you're saying is that there is no good use for this card now. Emphasis on word now. If there were more spell damage & Gas decks going around, this card would be played much more.
Cards should be buffed only if they are weak in every way, and thus unused. Reflective Shield is perfectly fine card, that is nowhere near being weak when compared to let's say Skeleton. R.S. can be easily used in any deck with Novas, Immolations, Quantum Pillars, etc. and it can singlehandedly stop one deck archetype that's widely known, but currently underused. Name another card that has such powers. ???
Rewind > Immo rush, Speedbow. And yet it's generally a weak card, ALMOST underpowered.
Now, we have another Gas-like card going on: Trebuchet. But guess what, apparently the Mirror Shield is too powerful, so it doesn't block Trebuchet. Also, comparing this to Skeletons is SUCH a low move. Of course there is a card weaker than this. So what? How does this prove anything?
Example: Bob's IQ is 2. Jack's IQ is 1. Obviously, Bob is not stupid, since Jack is more stupid. Wait wut?