The Grimoire card seems to be a Bungie joke to justify a random quest that awards a “celery stick”, of all things, and a nifty shader upon completion. But what, if any, lore significance would they have at all? If taken seriously, the Raisins are implied to be sentient but not malevolent, and that’s it.
I’m rather surprised no one has thought to bring up the “Savathun’s behind everything” hypothesis again when this card came out.
They could be Hive spies since they are Ascendant. They could be Savathun or Dredgen Yor. Or Worm God’s, or Ahamkara. I don’t think these would ever play into the universe unless Bungie makes it a long running Lore joke.
I think that’s what will end up happening. It’s a carryover from the 2015 Festival of the Lost event, and that “piece of celery” will have some importance down the road.
Year 2: Raisins
Year 3: Ascendant Raisins and Wilted Celery
Year 4: Ascendant Celery and Bland Peanut Butter
Year 5: Ascendant Ants on a Log. The Snack of Hive Gods.
Year 6: Toland returns to our dimension to eat our snack and we gain infinite knowledge about the hive.
Then we find Saint-14 working with both of them to stop a time traveling Lysander who is using vex technology to pull the Concordat through time so he can take the City in force and is drugged up on vex milk and ether making him a giant genius time traveler which is how he pulled concordat through in the first place! I’m going to remove my spinfoil hat now…