That is the Familiarisation Distraction and Diversion, which has been in-game for 10 years.
That D&D does not award xp. it awards you with your choice of a box of summoning ingredients, for making pouches, or a charm drop enhancer that gives you 40 minutes of triple charm drops.
The shards do not leave the D&D. They are what you turn in for your reward. If you did not select your reward when the D&D ended, you should be able to speak with Pikkupstix in Taverley to select one.