Gallus as the element of magic (i.e. friendship) does make a kind of sense. Back in the Hearth’s Warming Club it was made pretty clear that for all of his sarcasm, he values and cherishes their friendship the most out of them all.

@Starswirl  
Yeah, cause right before this, the roots of the Tree glowed with the colors of them mane 6

@Background Pony #F376  
Powering the students is the tree, not Starlight.

I was like are they going to go all elements of harmony all up in this place

@Background Pony #F376  
Magic that they were bathed in to give them that magic.

@Kibate  
Sorry, but the magic there is the same color as Starlight’s normal magic. She has a very big part in it.

It didn’t look like Starlight had anything to do with the magic, rather, with the hints of the tree of harmony giving these 6 special lessons, it was the trees doing, recognizing them being capable of elements of harmony

@Background Pony #F376  
Well, considering one can cause tsunamis, it’s not a far off idea

@Background Pony #F376  
Maybe the display Starlight gave off against Discord gave Cozy the idea to use her for that?

Seriously, does anyone else think it looks like they were using Glimmy to power up the items for some reason?

@Background Pony #F376  
Well, the colors for Silverstream, Smolder, and Ocellus easily make sense. Sandbar’s as kindness is likely right as well as Yona as honesty (as much as yaks can…) Of the group Gallus is more the leader, so hence that aspect…

@Background Pony #F376  
We won’t know till ether the English subs or 2 Saturdays from now

Looks to be a one off thing considering the power appears to be fueled from Glimmy.