Rainbow Dash Thread?

And, years later, we still see this.

@Background Pony #E1CD  
Twilight is most likely the last one to receive her key during the final episode more likely as the catalyst when the hypothesized villain is winning.
 
Cue Rainbow Power.

@Background Pony #00A1  
No, you’re on the right track, I believe Pinkie will get something in the Weird Al episode. I don’t know about Twilight and Applejack though…

So far, unless I’m forgetting one, every episode where the Mane Six have made a journal entry involved one of their members losing sight of or going against their Element and ended with a close up of something they received for their troubles.  
Dash abandons somebody who needs her help and after going back to save them, ends the episode with a special copy of a book.  
Fluttershy gets pressured into behaving in a manner she views as cruel to creatures she deosn’t believe deserves it, and winds up with fangs.  
Rarity loses sight of herself after her generosity is turned against her and gains a spool of magical rainbow thread.  
Maybe it’s a trend! Or maybe I’m just being delusional and paranoid.

My gut tells me we will be seeing this again. From what I remember every ending to an episode if this season so far has sprouted more questions.

@Background Pony #F914  
I had a similar thought. Only it’s not just their virtues, but specifically their Element, as it was Rarity’s generosity that was exploited and turned against her.
 
So I’ve got my suspicions about “Rainbow Falls” (loyalty) and possibly “Pinkie Pride” (laughter).

It reminds me of the “pieces of eight” from PotC: World’s End.
 
Who says keys have be actual keys? Makes me wonder what “keys” the rest are going to obtain.
 
Dollars to donuts, the 10th episode (Rainbow Falls) is where RD earns hers.

The thread is placed next to threads which each match her friends coat colours.
 
It could be foreshadowing to the rainbow power thing.
 
Maybe the other ponies have similar situations where they end up having their virtues used for or against them, and come out on top when they do the right thing. Also, they get a rainbow trinket as a reward, which may or may not become a key.

@PoniiAndii  
Your version’s better, overall, methinks.

@A Sad Pony  
On the other hand, now that I look at them both, it’s obvious you put much more work into it.

@PoniiAndii  
Oh.
 
Oh, well.

@PoniiAndii  
Yes, you was, but… whatever

Guess I was a bit faster.^^  
>>514911 (Though it’s not processed yet…)

BEHOLD THE FIRST KEY

@pwingbrony  
Damn…ya ninja’d me.  
Yes, I think you’re right. As the season goes on all 6 will receive some random object that turns out to be a key.

Someone make a 3D Model for Source right away.

I have a feeling that this is related to Rarity’s key to the Tree of Harmony box. In the scene when she was lamenting her friends not being at the fashion show, her eyes had a multicolored flash as if she found something. And, then she got the spool for her ultimate act of generosity when she realized the error of her ways. Just a hunch.