One thing that sticks out to me about this card is that it hurts monos and duos far more than rainbows. Most rainbows won't even notice until you play three of them. A lot of us (as demonstrated by the continual discussions to nerf Supernova, Discord, etc.) would like to see monos and duos made more competitive. So I have a weird idea.
How about, instead of limiting the number of
quanta in each element, this card limits the number of
elements from which you can use quanta? One shard = 6 elements, two shards = 3 elements, three shards = 2 elements, etc. To keep the advantage for Aether, having an
mark could allow a fourth shard to limit your opponent to one element. This would make it a really strong (maybe too strong) counter to rainbows.
I'm not quite sure how this would work, but I have an idea. When one of these is played, your opponent's six smallest quanta stacks could be set to zero, for as long as the shard is in play. This would seriously cripple a rainbow deck, but monos/duos/trios wouldn't even be affected until 3-4 shards were played.
Is this idea completely crazy, or could it work?