Alrighty, time for a full story commission. They opted for 5 long chapters as opposed to 10 shorter chapters. They were quite specific about what they wanted in this story, so let's get this going.
Tails had gathered all seven of the chaos emeralds together.
It had been a bit of a struggle, but he'd managed it, using his scanner to track them down and his containment devices to prevent anyone realizing he had them.
He didn't like keeping secrets from his friends, but he knew full well that if word got out about the massive power sources all being in one place, it would only end with them all being stolen away, and he really didn't want to have to worry about that.
He planned to study chaos energy scientifically, something he'd never had the chance to do up to now, always having to improvise machery around it on the fly.
But now he had all seven together in one place. What's more, he had the Master Emerald, thanks to Knuckles, who felt it best if it was behind Tails' many walls and turret guns where Rouge and other thieves wouldn't be able to reach it, and several of the less powerful and unique, but nonetheless strong chaos emeralds that Sonic had occasionally encountered in his youth.
The weaker chaos emeralds were capable of being destroyed, and when broken they practically became part of the environment, flooding it with energy and trickering ecological disasters at random. Tails suspected that these smaller, less power emeralds were actually ill-formed versions of the core seven, and given enough time and pressure they would eventually become chaos emeralds like the initial seven.
If so, it might also be possible for the seven chaos emeralds to become master emeralds as well, as opposed to the temporary shift to super emeralds. It was all quite confusing, made even more so by the living spirit that dwelled within the Master Emerald.
He'd need the help of one of the Echidnas if he was to fully understand the ethereal aspect of it, but for now, he could handle studying the scientific aspect. The flow of energy, the transfer of power. Little did he know, the ethereal aspect of these gems was almost if not more important for his studies, as the emeralds could sense his emotions, his wants, his needs.
They could feel how eaten up he was within. Disasters he couldn't have stopped, failures he blamed himself for. He'd been awake far too long lately, been pushing himself far too hard.
He didn't want to stop his research and suddenly be forced to think about the things he'd lost.
Fiona and Cosmo came to mind, the most painful if not the most recent. His cheek still burned where Fiona literally slapped him off his feet, and he could still see Cosmo in her Full Bloom form, just out of his reach.
The fact that Fiona was a bitch or that Cosmo had specifically asked him to do what he'd done didn't ease the pain. It all just piled up within him, mixing together and making him feel so very, very weak.
Well no more he thought as he put the finishing touches on a device that he hoped would analyze the power of the chaos emeralds.
He would understand them, he would learn how to use them to prevent anymore disasters. Even as intelligent as he was, he couldn't have known how right he was. Perhaps it was inevitable given that these were the Chaos emeralds, but despite everything seeming to be in perfect order, things went wrong almost immediately when he turned on his device.
Electricity arced from the machine, gears ground together, heat built up, and the backup generators meant to contain any spillover of energy-and which were powerful enough to contain the equivalent energy of multiple nuclear explosions-burst into flame and began letting their stored energy spill out into the air around them.
Tails tried to leap into action and fix things, but he wasn't sure where to begin, unsure what had even gone wrong. He settled on making a beeline for the Master Emerald though, hoping that if he could detach it from the machine, it would kill whatever feedback loop of energy was causing this.
He was half right. The chaos stopped.
And his workshop exploded.
The mushroom cloud was seen for miles in any direction, and it was mere moments before help arrived, Sonic arriving on the scene with his speed, Shadow investigating the burst of chaos energy and arriving through chaos control.
Before they could see each other and begin their normal bickering though, they were both caught off guard by the realization that, despite the size of the blast they'd seen, and the clear line of scorched earth indicating the blast radius, Tails' actual house appeared to be fine, either unaffected by the blast, or somehow re-assembled after the fact.
Heading inside, the two of them caught a glimpse of Tails hovering in the air before two solid punches knocked them both unconscious.
When the hedgehogs came to, they'd been brought to the basement of Tails' workshop, Tails himself nearby, the look of calm on his face unsettling.
"It's nice of you two to have worried about me," Tails said in a condescending tone that sounded odd coming from the normally sincere fox, "But I assure you I'm quite alright. The explosion was but a rush of chaos energy escaping the mechanical trappings holding it in. Though I'm still not altogether sure how or why, the actual emeralds are fine. In fact," Tails tapped his chest, "They're all in here. I must say, the power feels almost… intoxicating~" There was something in his tone that unsettled both of the hedgehogs.
"My god.." Shadow said as the full implications of what was happening hit him. Tails had somehow merged with the emeralds, using them now as batteries to power himself like he would a machine. When Chaos had done this, it had become powerful enough to match Super Sonic.
Unlike Chaos though, Tails also had several raw, uncut chaos emeralds and the potentially limitless energy of the Master Emerald circulating through him as well. It was more than likely sheer improbility keeping him from detonating at the cellular level. He was, for all intensive purposes, a god.
Shadow couldn't begin to imagine what that must have been doing to his mind, or what a sentient mind would do to chaos energy. His blood grew cold at the understanding that he was likely about to find out."Now, since you're both here, how about we have a little fun~? I'd like to test out this energy before I take it out."
"Tails, buddy, I don't think you're thinking straight." Sonic said nervously. Tails snickered, "Quite the opposite, and ironic. I'm thinking more fluidly than I ever half. It feels like my processing power's been quintupled in an instant."
Tails moved, though not even Sonic could be certain he actually hadn't teleported it went so fast. He walked calmly behind Sonic, bringing his hand down on the nape of his neck. Sonic let out a choked gasp as he dropped to his knees, the shock of pain running through him so instantly and intensely his brain couldn't even keep up with it.
"Now like I said," Tails said as he let his thick, hard member slap Sonic in the face, "Let's have a little fun~"
Sonic practically went white at the sight of it. The rush of chaos energy had done more than alter Tail's mind and powers, his body had been affected as well.
His rod was impossibly long, more than twenty inches in length, and over four inches thick. It was warm, almost hot actually, and throbbing for attention.
Sonic opened his mouth in question, but his words never escaped, Tails grabbing his head and yanking it towards him as he thrust forward, thrusting his cock into the blue hedgehog's mouth and then passed it to his throat.
Sonic gagged hard, throat gripping Tail's cock as it choked him. Shadow watched with horror as tails abused Sonic's throat, thrusting hard to force more of his length inside, moving his feet to grind the heel of his foot against Sonic's crotch.
Sonic squirmed beneath Tails, gagging harder around it as he felt the pan form Tails' foot practically standing on him, Tails grinding his heel down harder to punish him for moving without being ordered to. Sonic's eyes watered, though whether it was from the pain of the foot grinding or the choking via his massive cock, not even Sonic was sure.
Neither were making things great. Tails kept going, hammering Sonic's throat harder as he grunted with the effort of forcing his cock in deeper, wanting his entire cock sheathed inside of Sonic's throat.
Unfortunately it was a bit too tight a fit, but Tails conceded that there was a better place to stuff his rod. He slid out of Sonic's throat and threw him over, the bound hedgehog landing with his face against the floor as his ass up.
Admittedly this was an even tighter fit, but unlike his throat, this hole could stretch out easier. Tails brought his hand down hard on Sonic's ass, making him yelp before he lined up between his cheeks, Sonic tensing nervously at the feeling of such a thick rod against his entrance.
Said tensing did him no favors, only making it hurt worse when Tails thrust into him. Tails moaned happily as he felt the hedgehog's tight ass grip around his rod, the tightness not slowing his member's penetration at all on account of the fox's new chaos energy infused strength.
Sonic could barely make any noise at this point, the roughness of Tails' fucking and the pain it resulted in so immense that he could barely think let alone to respond to what was happening to him. It was all so intense, and the only think he could even really perceive anymore was Tails' unreasonably thick rod ruining his once tight ass; occasionally mixed with his hand beating against it as well.
Tails lifted the blue blur up from the ground, lifting his legs and forcing them behind his head; locking him in a cox knot as he plowed into him from below. With gravity and his new strength, it was mere moments before he was completely hilted inside of Sonic.
Granted it caused a massive bulge in the hedgehog's stomach and no doubt put him through unimaginable pain-if not from the fucking itself than from the painful mix of shocks and heat that the chaos energy aura emitting from Tails' entire body (cock included) caused-but that was hardly of Tails concern.
Tails' power was wearing away at Sonic's impressive durability. He'd taken quite a lot of damage in his time, but he'd never taken this much at once and he'd certainly never taken it quite like this.
His eyes began to glaze over, but to make sure his mind fully gave in, Tails let his two namesakes rise up and reach around Sonic's body.
His member was solid, not from enjoyment so much as just pure stimulation. Regardless of the reasoning, Sonic's member was indeed erect, allowing Tails to toy with it, his two tails wrapping around it and rubbing it from either side.
Sonic groaned as he was stroked by the soft appendages, the pleasure jarring when mixed with the pain from Tails' continued hammering into his tight asshole. But Tails kept going, jerking Sonic's seven inches aggressively, the warmth and skill of it more than enough to feel wonderful and feel amazing in any other circumstance.
Soon Sonic started cumming from the pleasure, his body giving it to Tails' abuse, unable to fight the sensation or resist the control any longer. Sonic's body belonged to Tails now.
And Tails could sense it, his grin growing as he began rutting his former best friend even harder, drilling his tight body with as much as he could without causing permanent damage to it.
Which was still quite a lot to be sure, Sonic's having been capable of handling quite a lot. To that point, Sonic's mind might have been repairable up to then.
It wouldn't have been easy, but it would certainly have been possible given enough time and effort. This changed almost immediately upon Tails reaching his new body's first orgasm.
His seed, hot to nearly the point of boiling, flooded Sonic's insides as a release of chaos energy washed over his senses; breaking whatever mind might have been left inside of him. There was nothing now but a toy for Tails to use as he wished.
Tails let Sonic drop to the ground, the dead eyed hedgehog simply laying there as Tails floated over to his other captive. Shadow had been attempting to struggle from the first moment he'd realized what Tails was doing, but all he'd succeeded in doing was hurting his wrists on the restraints.
Shadow's inhibitor rings normally kept Shadow's power locked at fifty percent so he didn't cause unintentional damage. With his new power, Tails had somehow amplified their effects. Shadow couldn't even use chaos control to teleport out of the room, and despite his attempts had also been unable to remove the rings.
Shadow, never one to give up even then all seemed hopeless, attempted to fight anyway, launching himself at Tails in a spindash. Tails' didn't even bother blocking it, letting Shadow impact his body harmlessly to make it clear how ineffective it had been.
Only after this did he retaliate, grabbing hold of Shadow with such strength it stopped his spin attack. He tossed the hedgehog like a ragdoll, causing him to slam face first into the brick wall. Before he could move away from it though, Tails was immediately behind him, keeping him pinned against the wall as his hand began sliding along the "ultimate life form"s back end.
"Mmm~ You know, I think you might have a better ass than Sonic." Tails praised, surprised by this revelation, "Only one way to know for sure~"
Shadow continued to struggle, but it was pointless, achieving nothing but an amused look on Tails' face as he lined up to Shadow's ass and slammed in with enough force to crack the wall Shadow was being held again.
The force caused Shadow to go silent instantly, his expression of desperation melting into a thousand yard stare as the pain and the power broke his mind almost instantly.
It was a combination of Shadow's mind being fairly week as it was, and of Tails caring less to be careful with Shadow. Tails grunted as he rooted his cock into Shadow as carelessly as he would a cheap sex toy, molding it around his cock and breaking the until then virgin hole in.
After the first minute he wasn't sure Shadow was even conscious, but he supposed it hardly mattered. He could fill the weakly up whether he was conscious or not.