Princess Celestia continued to watch as Discord continued his "rampage" through the city of Canterlot, in as much his idea of "rampaging" was random acts of chaos at random locations in the city. The street patrolling Guards would've been able to do little against it, of course, and it was cold comfort that so far Discord had only kept himself within the city walls of Canterlot. The sun princess was sure any distress message to Twilight Sparkle and her fellow Element Bearers would not be believed until it affected them directly, but that fact would also doom the citizens of Canterlot to his torture - something that would be extensively used against Celestia later...
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Looking around after his latest teleport, the draconequus Discord spots a sign over an unassuming white stone building: "'The Mule' and Associates - Attorneys for Hire". His eyes glow as he immediately decides to make this his next target for chaos, shrinking down and assuming a cobra-like form small enough to slip through the mail slot on the front door.
Several ponies were waiting in the area, unaware of anything wrong outside. They became very aware of the problem, though, when the snake-like form Discord had assumed started growing larger and larger in front of them. He relished the fear and screams he heard coming from them, hissing and flaring the cobra hood as he grew big enough to almost touch the ceiling as he crawled the length of the waiting hall! Some ponies ran to a corner, petrified with fear, while others cowered and covered their heads as he went by.
Finally Discord in his giant snake form stopped next to a door, pressing his head up beside it to hear a monotone voice drooling on from the other side, completely unaware of what was going on. The now-thoroughly scared ponies in the waiting room he let exit - he wasn't in the mood to torture them more, not yet anyway. Instead, he simply rammed his way through the door, accompanied by a blast of magic that changed the cobra form into something more colorful and feathery - a human might have called it a "quetzalcoatl".
Unsurprisingly, the door suddenly blowing off its hinges by the "quetzalcoatl" stops the proceeding dead in its tracks. The earth pony lawyer, wearing a long "sad" face, is immediately struck by curiousity instead of fear as the couple he had been helping scamper to a far away corner, cowering in fear as the ponies in the waiting room have.
"Hmmm, I was expecting 'The Mule' to be an actual mule, not a sssssad-faced earth pony." the "quetzalcoatl" Discord spits out. "No matter, this place is deathly dull, needs a lot more life in it!"
Discord's eyes glow, and the shelves full of books and knick-knacks lining the walls of the room begin vibrating, as if an earthquake was shaking the building. Some items on the shelf fall down the floor, and anything that doesn't shatter begins levitating on its own, the books flapping like bats and begin to zoom around the room! The cowering couple begins screaming as the "book bats" begin dive-bombing in their general direction, Discord relishing their fear as they dodge the attacks.
Meanwhile, the lawyer grabs a scrub brush from one corner of the room and waves it all over the place, trying to fight off the flying "book bats" attacking his clients. Discord hisses, eyes glowing, and the "book bats" now switch to attacking him. He does try to fight them off, but several impacts from the heavy books finally knock the wind out of him, and Discord switches to a hissing laughter as he falls onto his back.
"Been fun seeing you fight, but I must be going!" Discord comments, flaring open previously folded up wings in feathers of brilliant colors. He begins to flap them and take off, blowing everything around and smashing through the ceiling in the process, emerging into sunlight again still as the brightly-colored "quetzalcoatl" flying above the streets of Canterlot.
Discord hisses down at the several guards arriving at the half-destroyed legal office, two of which are pegasi that quickly take off to attack him. His sleek body and powerful wings easily dodge the initial charge, the tail lashing out to pluck one of the patrolling guards out of the sky. As the other attacker comes around, Discord whips his tail down, slinging the unfortunate pegasus down into the partly-ruined building below him.
The chaos entity caps his accomplishment by getting nearly snout-to-snout with the other pegasus, his huge hissing and fanged form surely capable of soiling pants had the pegasus been wearing them at the time. Finally, Discord shrinks back to his "typical" draconequus appearance, floating and laughing on his back at the pure fear on the face of the pegasus Guard, before teleporting away again to continue spreading his chaos in a different part of the city...