I would suggest some sort of fading effect, like both quantum lattice and grid provide full protection for one turn, and then start to decrease, but at different rates.
How about Lattice: Refresh all of your quanta producing cards in play. Your opponent can not disturb the quanta of 12 elements. Subtract 6 from this number each turn.
1st turn: All 12 protected
2nd turn: 6 random protected
3rd turn: 0 protected
Grid: Refresh all of your quanta producing cards in play. Your opponent can not disturb the quanta of 12 elements. Subtract 4 from this number each turn.
1st turn: All 12 protected
2nd turn: 8 random protected
3rd turn: 4 random (not necessarily from the previous 8 ) protected
4th turn: 0 protected
It might also need a nonzero cost as it is somewhat more powerful than your original idea.
Compare it to Nova.
