Jewels of the Oracle Let's Play: Hall of Hidden Links

Grain and Grain what is Grain. We must now solve a puzzle that takes “figure it out yourself” to a whole new level entirely. We must pair objects based on something or other without any indication of the something or other with no understanding of whether we are right unless we are right about everything. Full disclosure: I hate this puzzle. In fact, the word “fuck” appears twice in this video, and I don't even curse all that much. Also, this is Hard Mode. In Easy Mode.... well, that comes later. We also derive an equation for the solution of the first n odd numbers multiplied together because it's still more fun than this puzzle. The only really important thing to gather from the math is... pick 2 or 3 that seem obvious to you, and play around with the others before changing one of the 2 or 3 that you originally picked. First n odd numbers multiplied:
The recursive solution also appears in the online walkthrough:
That weird music near the end is the “Techno MixFull” from Civilization III. Oh, and that “Book of Wesbster” thing... if you ever played the Journeyman Project 3: Legacy of Time, yes, that was some Arthur. Finally, I am aware that Sickle and Quern may not be 'foreign' to everyone. Of the objects in the room, they are the ones that aren't as 'household' recognisable for most people, at least as I would guess.