Ponyville is a very different place...

Waiting for the train to come to a complete stop and open the doors so he could re-enter Ponyville, now almost explicitly his sexual playground, was agonizing. But it did give him a little more time to think. The encounter with Eris had really rattled him, and he now felt a need to cover his ass so that no one could ruin his fun.

So when the conductor announced that the doors were opening and all the departing ponies on the train got up and moved, Isaac muttered under his breath as he moved behind them.

"Will no one else ever think it's weird or suspicious if I ask questions aloud, no matter how seemingly random or specific? Will no one else ever suspect that I am causing reality-altering effects or even am the beneficiary of reality-altering effects, unless I specifically allow them to like Chrysalis? Will no one else ever make a logical connection between the details in my questions and potential changes to reality? Will everyone else casually brush off me knowing 'too much' when I ask a question as me being observant, perceptive, insightful, well-read, and/or informed by someone else? If anyone else does suspect that I am disproportionately lucky and privileged in ways they would not tolerate for others, will they rationalize it as being fair, good, righteous, and just in my case? If there are other Roots like the Root of Honesty, will no one besides me ever find them in my lifetime unless I allow them to? Am I immune to any and all mind control and subversive perception altering effects? Will no one ever physically or magically harm me in any way or allow me to come to harm by accident or neglect?"

As he stepped out onto the platform after that barrage of clauses, Isaac took a deep breath to refill his lungs. "Fuck, I'm gonna become a lawyer at this rate..."

Mere days ago, walking through Ponyville had been an exercise in social ostracization. No matter what street he walked down, if he encountered a pony, they avoided eye contact and kept their distance even if they were the type to greet a passing stranger.

Now, though? Walking through Ponyville was a fucking treat.

Massive torso-obscuring tits and wobbling heart-shaped bubble butts as far as the eye could see. The latter on the girls and the guys! Everyone was incredibly sexy by default, thanks to his changes! Ponies he remembered being kind of plain or average before - though still exotic to Isaac, being anthropomorphic ponies after all - were now ready to be pornstars as the 'average' got cranked up by his reality changes! The 'smallest' bust size seemed to be around head-sized, maybe F-cups back home at the very least, and some of the bigger mares, you couldn't even see their waists!

What was more, they were all showing it off without a care in the world. 'Skimpy' was the word to describe the overall dress code. Bikinis, tiny skirts, tank tops, booty shorts, open blouses, high heels... Some mares even had their nipples and pussies exposed and no one batted an eye! No, even more than that, Isaac shortly spotted a couple of ponies down alleyways quietly masturbating or fucking before getting on with their day!

There was something worth tweaking, though. While the tops and bottoms were nice and optimized for sex, the spot in-between was still left to its own devices, sometimes being unappealingly average or pudgy. Couldn't have that, now could we?

"Do the sapient creatures of this world naturally have narrow waists and hourglass figures, except in cases where they're appealingly pudgy, plus-sized, and overweight, or they're muscular and well-built? Do they not have any health problems from having exaggerated body types?"

And just like that, all the mares in his view were even more impossibly sexy. In an instant, waists shrank down to highlight how their hips and busts flared, or swelled up as they developed an appealingly soft belly or a six-pack. Sure, there was fewer variety in body types now, but they were all body types that set Isaac's perverted sensibilities on fire, so it was all upside!

Of course, there had to be some blind spots in his scattershot changes, and one such change appeared in the form of Granny Smith crossing the street with her walker. She still possessed mighty, pornographic assets... but they were attached to her wrinkled, decrepit, hunchback frame. Not ideal!

Isaac glanced aside and muttered, "Do the sapient mortal creatures of this world age gracefully without blemishes or significant deterioration, their beauty maturing rather than fading?"

He looked back at Granny Smith, and sure enough, she no longer needed her walker. In fact, the grand matron of the Apple family clan was now stunning! The family resemblance to Applejack was a lot more apparent now that her face had tightened up. Her skin in general was still taut and smooth, with just a few long lines here and there showing her age. She carried herself with an unhurried but confident gait, her large breasts and massively soft ass jiggling with each step as she wore little more than an apron.

The now certified GILF passed by without incident, and Isaac had to wonder at what he'd done. He wasn't usually interested in mature types, but with the supernatural power to bring them in line with the rest of this pornographic world... hell, maybe! He realized this would also apply to any grandfathers as well, and he wondered how that would interact with his broad changes to this world's masculinity.

That was for later, though. He intended to be staying in this world a long time, and he'd have plenty of opportunities to sample and tweak the entire spectrum. For now, though, he was on a mission, and he had a list of targets.

First up? It seemed only logical to head towards Twilight Sparkle's crystal castle at the edge of town, next to the School of Friendship.

...Huh, the School of Friendship was still around? If everyone in this world was 18 and older - which Eris had completely confirmed - then Isaac had to wonder what the foreign exchange students learned there.

Knock knock knock went the dorm room door. "Guess whaaa~aaat?"

The other five occupants of the room looked up from their impromptu orgy. Ocellus, the busty changeling teen, looked up from Yona the yak's pussy and back over her shoulder. "Is that Gallus?"

Smolder, the dragon teen giving the bottom-heavy pony Sandbar a hotdogging while the hippogriff Silverstream gave him a simultaneous titfuck on the other side, chuckled as she looked at the door. "I bet I know what this is about...!"

Yona, the amazonian teen yak of the group, pushed Ocellus's head back down into her pussy. "JUST OPEN DOOR! YONA IS TOO CLOSE TO GUESS!"

"Fiiiiiine~." The door creaked open, and a blue griffoness strutted into the room completely buck-naked, showing off her new perky tits and swollen pussy, her lion tail sensually whipping behind her as she performed a full 360 turn.

Silverstream gasped and waved, eyes sparkling with excitement! "You did it! You finally did it! Way to go! You look hot!"

Smolder folded her arms and nodded approvingly, still grinding her ass on Sandbar's horsecock. "Welcome to the superior non-Master gender. Happy to have you."

Sandbar chuckled, leaning back on the bunk bed where he sat to look past Smolder's wide hips. "Heck yeah, you look great! Guess that means I'm the last stallion standing, but no hard feelings. Do you want us to call you by a different name?"

Blushing smugly like she was accepting an award, the blue-feathered griffon put her hands up to calm everyone down. "Gallus is fine. Honestly, I shouldn't have held onto my pride for so long - this feels fantastic. How do you girls not wanna cum all the freaking time?"

"THAT IS SECRET - WE DO CUM ALL THE TIME!" Yona yelled before spraying juices into Ocellus's mouth. The changeling gulped every drop greedily, her body glowing and swelling a bit as she shared Yona's physical love.

Sandbar let out a wistful sigh as his cock refused to join in the festivities despite having two beautiful girls attending to his dick with their incredible assets. "Yeah, you girls are definitely more wired for it than we are..."

"You getting cold hooves?" Silverstream asked with genuine concern. "We really appreciate you being our practice dildo for our assignments, but if it's making you uncomfortable..."

Gallus's soft beak curled into a grin. "Hold on. I still remember what it's like to be a guy, so maybe I can help him along..." She crawled onto the lower bunk of the bed and got up close to Sandbar's ear. "Just imagine: The Master bursts into this room, cock erect and ready to go~."

Sandbar's breath caught in his throat. His horsedick stiffened between Silverstream's tits and Smolder's cheeks. His eyes glazed over as his imagination ran wild.

Gallus reached down between her legs to trace her claw around her puffy pussy lips. "He fills Ocellus with all of his liquid love. He overpowers Yona and makes her his bitch. He covers Silverstream with so much cum she turns back into a seapony. He stuffs his cock into Smolder's mouth so that she finally shuts up."

"Pfff, as if," Smolder scoffed playfully, though she reached up to play with her hardening nipples all the same.

Sandbar was panting for breath. Gallus wasn't done. Her other claw reached behind Sandbar's ample bottom and started to play with his puffy asshole. "And then~..." she purred, drawing out the finishing blow, "he picks me up and fucks my brand-new pussy right in front of you, full-nelson style. And when we cum, we spray you in a flood of pussy juice and Master's semen, while you sit right there on the bed, jerking off your inferior, useless, pointless pony-cock!"

"Guuuwaaah!" Sandbar cried out, his long cock swelling and firing a long arc of pony-cum all across the dorm room, sailing over Yona and Ocellus and splattering the other bunk beds, top to bottom, until his swollen balls were spent.

"Yaaay!" Silverstream cheered with her arms raised. "That's titfucking, hotdogging, and team-play all checked off at once! Thanks, Sandbar!"

Sandbar wheezed and fell back onto the bed, blushy and drained. "Happy to... help..."

Smolder chuckled and hopped off Sandbar's lap, giving Gallus an approving look. "Told ya you make a natural slut."

Gallus panted, having squirted a little herself at her own fantasy she'd been weaving. She gave Smolder a clawed thumbs-up. "You know it!"