@Background Pony #1AE0  
Let’s just accept the more likely explanation: sloppy writing

As ye sow, so shall ye reap.

@Background Pony #1AE0  
If I’m parsing the garbled mass of text you just spat out properly, I would direct you to my argument earlier that Discord doesn’t have a lot of raw power, he’s just very effective against ponies.

@Background Pony #1AE0  
Yeah, I think you’re right on this “absurd plot” point.  
It’s why I’m for the “All this shit is to teach Twilight lessons.” side.  
It’s a bit “Shut Up;It’s Magic” and DeusExMachina-ish, though…

@Kahas  
For what we know maybe Celestia is so awesome she did saw ALL of it coming and made a deal with Discord so he’d pretend to lose his magic “only adding some power to the minotaur guy” only in order to Twilight defeat him by herself and prove her as a princess, or maybe Discords magic power is really the same as whole ponies + mane 5’s power making him capable of absorbing it, although if we consider it that way we might find a couple of other problems such as: Twilight magic power + Celestia, Luna and Cadence is equal to ALL ponies + Discord’s magic power, but Discord can troll as he pleases any of the Princesses, meaning his magic power is superior to them alone, but to make the balance right lets say if Tia and Luna gave their power to Cadence alone she’d already be stronger than Discord? if so, why use the Harmony to defeat him xD

@Background Pony #1AE0  
Changeling magic is green because it’s color inversion of pink.

@zabchan  
Changelings magic is green, it has nothing to do with it been dark or holy i think it depends on what you cast considering Celestia could cast both her Holy Magic and Sombra’s dark magic.

@zabchan  
His first teleportation was green.

@zabchan  
Then maybe Tirek didn’t steal all of his magic.
 
We know (Lauren Faust’s canon) that Celestia a partially prescient. In this canon perspective, she knew how this adventure would end, and so Discord.  
Maybe the wink from Discord to Celestia at the end of the finale refers to this ?

Seeing Discord’s magic sucked out of his mouth like that is pure nightmare fuel. Yikes.

@Kahas  
Agreed, although on an interesting note, if he was truly omnipotent, I’d imagine it would be much more likely that tirek couldn’t have stolen all of discord’s magic in one go…he’d OD and explode, trying to absorb it all. And I’m having to rethink some of my old theories, like if he were a pure spirit of chaos, stealing his magic would have robbed him of his very_being_and not just magic ability.
 
Oh god what if tirek had drained discord of magic and discord had turned into a snarling, growling chimerical beast, devoid of sense and sentience?

@zabchan  
It’s still yellow, so you’re right ^^
 
Hm, but remember when he was under pony form to surprise Tirek in the dark street.  
His fake horn was all light blue and so his magic aura.  
Discord seems to be able to do whatever he wants even with this kind of basic and primary rules of Magic in the world of Equestria.
 
And also there is his capability to sense any modification of the balance of magic anywhere. It’s an interesting power here.
 
Discord is not just a super powerful wizard, he seems to truly be an incarnate timeless omnipotent spirit.

@Kahas  
 

 
i’ll give you that it’s not often…and it might possibly be only this one incident…

@zabchan
 
Yellow ?  
For what I can remember, most of the time there is not even an aura around things made or moved by Discord.

@Dr_Osaka  
Or that Discord is a good actor.

@Alara Rogers  
oh i was thinking something like he has “personal” magic that he uses to funnel the chaos through, but sure, we can go with “it’s chaos, i aint gotta explain shit” :P

@zabchan  
Because it’s chaos. Using it turns it the only color it’s not. :-)

Looks like warp energy…OH MY STARS, QUICK! DEFEAT TIREK BEFORE KHORNE GETS HIM!

@SRD639  
MLP:FiM has had some equally dark moments before this.

@Rayberay  
I honestly never knew MLP:FiM could get this dark.

@Background Pony #0076  
Dark magic is green, like the one Sombra or Chrysalis use.  
Discord’s is CHAOS magic.

I like it when the screen goes all letterboxed. Reminds me of the 2003 TMNT which did that all the time.

@Conred  
it is interesting that the chaos magic didnt contain any yellow, which up till now was the color used whenever discord levitated objects.

@zabchan  
I think this is first time they showed us Chaos magic which is different from dark magic and harmony magic