Hello :D

The market is continously full of Ancient Seal - Black Shard and Ancient Power - Red Shard, because as we all know, the drop rates are unequal between the two shard colors in their own monster zone. Take Aakman, where Ancient Power drops, Red Shards are obtained fairly easily, but Black Shards are hard to come by. It is annoying enough as it is that two parts of a whole have different drop rates, but to make matters worse, the easier-to-get shards are completely useless.

So an Ancient Power - Red Shard is worth 5 mil, according to the marketplace... but good luck ever selling any at all. You might as well drop 1 silver, because that has more value than something you can't sell...

So here is a suggested solution: please let us combine 5 - 8 Ancient Power - Red Shard, or 5 - 8 Ancient Seal - Black Shard, to create 1 Ancient Power - Black Shard, or 1 Ancient Seal - Red Shard. 
This way, the 'useless' shards gain some use and value again. They won't only become unsatisfactory, roll-your-eyes drops. If 5 were to be combined, it could work just like with relics and such, in a cross-layout. But if combining more of them would make more sense to the devs, they can also opt for 8, because from left to right, 8 fit in your inventory in one line.