A 1x1 defense that provide shield against lightning spell, against dark storage farm?

I keep having my dark storage stroke by lightning spells, multiple times because those attacks don't give shield. There is pretty much nothing I can do about it even if I try to max out the defense. I don't think it is very nice play.
I checked the idea list, and saw an idea of making tesla lightning absorb, when revealed. But that would not help this issue either because the tesla wouldn't be revealed .
I suggest making a defense, something like a lightning rod, that will absorb lightning in very small radius, enough to protect 1 3x3 building. It could be used to defense a mortar in war as well. This way, it would not really tip off the balance of the game, and keep us from being frustrated once in a while.
Another suggestion is to have more HP to the dark storage, that way, even if 4 lightning spells strike, we would only lose a fourth or a fifth of raidable dark (at the moment, we are losing more than a third)