The Tiny Box of Raisins that Guardians received from Eris Morn (and held onto) have morphed into the Ascendant Raisins when the last patch was applied to Destiny. This allows the Guardian to complete an unmarked chain of Trades which will allow them to acquire the long sought after Super Black Shader.
If you got rid of your Tiny Box of Raisins, simply complete the Sweet Memories quest offered from Eva Levante. Talk to Eris Morn at its completion to get the Tiny Box of Raisins.
Go visit the Speaker with your Tiny Box of Raisins and 25 Motes of Light.
The Trade Sequence
With the Ascendant Raisins in your possession, it is time to begin trading them through the proper sequence.
Bring the Ascendant Raisins to Zavala. He will trade you them for the Salted Sweet.
Bring the Salted Sweet to Master Rahool. He will trade you it for the Winged Chew.
Now bring the Winged Chew to Amanada Holliday. She will trade those for the Splice Drops.
Visit Cayde-6 next. Trade the Drops to him for Unchocolate.
Now, head to Eris Morn. She will have a Bag of Treats for you. Inside it you will find the Superblack Shader and a Piece of Celery