I've been holding onto nearly 300 shards ever since Hard Mode King's Fall was available. These could easily be made to dismantle for rep, just like treasure keys or those Variks tokens. They could be turned in to Eris for rep, like Etheric light to Petra. These became entirely obsolete when the new expansion launched, so it would be great to do this small favor for those who have raided quite a bit and have had these shards building up.