Ty shivered as he entered an old, abandoned mansion deep in a secluded forest. Entering the place made his skinny rat body feel cold, even with the semi-thick suit he wore from head to toe. He was a professional ghost hunter, asked to help clear out the spirit haunting this place. He was told it was a powerful one, requiring his expertise to get rid of. The money he was going to make was going to be great, but he wondered if it was worth it once he stepped in through the front doors. Outside was sweltering hot, but here, it was like a freezer, suggesting the power of the spirit. He looked around and saw that there was heavy amounts of dust everywhere, but lights were on, like someone was living here even though there was no signs of it. It worried him a bit, but he continued, entering through the doors ahead to a grand hallway to the rest of the house. It was eerily quiet except for his footsteps, not even the noise of anything alive here. Well, no… there was a noise, faint, but there. It was far away, so he headed for it. The closer he got, the more his equipment went off, warning of a spirit. Slowly, he pinpointed it to a door, and opening it, inside was…. a gym? It was filled with plenty of equipment, possibly saying that whoever lived here trained their body. Ty’s equipment was still going off, telling him that the spirit was in this room, but where? He began to investigate around the room, unaware that a presence was manifesting behind him.

Ty was busy letting his specter detector scan over the equipment, as he felt the hair on the back of his neck stand up. He was about to turn his head to check behind him, but it was too late, as he felt the thing behind him touch him. However, it wasn’t what to be expected. He though he was about to be attacked, but instead, it felt like a hug from a very big, muscular friend from behind. Fears subsided, although his hairs still stood up tall, as he was held in embrace of this ghost through the suit and the clothes below he was wearing. It felt very kind and loving, feeling a ‘kiss’ on his neck. The big hands of the spirit rubbed his sides with loving caress. He looks up and sees the big mirror in front of him, expecting to see nothing. But there was something, a giant, muscle bound dragon with a warm smile on his face. Ty gasps when he sees the hunk of a ghost, as he looked so beautiful. The dragon continue to kiss the rat, his loving paws rubbing his body with care. It felt so good to Ty… it was starting to get him aroused, and certainly the spirit was noticing it too. The dragon got closer behind him, where he could somehow feel the front side of the dragon on his backside physically. And then, a surprise! He felt his small butt get penetrated by the dragon, feeling a big cock enter his hole. Ty began to moan, his dick hardening in his underwear and pants as he started to get fucked by the spiritual meat of the dragon.

As the ghost dragon fucked Ty, he was feeling changes in his own body as it seemed his ass wasn’t the only thing getting entered. Deep in his soul, he could feel the spirit of the dragon interact and combine with him slowly, overwriting his self. Physically, his body started to grow as Ty watched, starting with his cock and balls. His fair 5 inch rod expanded out to a girthy 12 incher, and his balls to tennis balls, sloshing with cum. It made for a nice, more noticeable bulge even in the loose suit. But that looseness faded as he felt every muscle in his body blow up with a lot of muscles. His skinny, twig-like arms and legs bulked up like a baseball player’s limbs. His non-existent pecs and chest grew out to be like a football player’s torso. Ty looked again, seeing he had grown nice and tight, a hunk of his former self. But why would this spirit do this? All he did want to say though was.
Ty: “Thank you.”
The dragon, in his head: “Don’t thank me yet. It’s not done.”
Ty: “Huh?”

Ty felt something extend from the head of his cock and work its way around to his ass and enter him, feeling like a tube of some sort. He then felt his cock get supernaturally rubbed, which felt extra sensitive with his new member. The spirit dragon was controlling his body now, making him stroke himself off. An orgasm built quickly, and now he felt the urge to cum badly. And cum he did, down through the tube and into his own ass. As he gave himself his own creampie, he felt that the ghost was making him absorb it into his body, and make his body grow even more. Ty began to flex to make his muscles bulge out, and watched as his growing muscles start ripping apart his suit and clothes. He continues to flex, and pose like a bodybuilder, watching as he exposed his hulking body under the shredding cloth. Soon, he was naked and twice his size as before, looking as gigantic as the ghost dragon was. But the dragon kept working him over, making him still cum and absorbing his own jizz to his body. He continued to grow bigger and bigger, soon as tall as the ceiling and nearly as wide. The walls began to creak and bend as his bulking muscles pressed against them, then crack and break as he broke though the ceiling and walls. It continued, hulking him through the mansions walls and ceilings till he ripped right through to the open air outside. The broken manor shrunk below him, the trees looking like toothpicks, and soon rivaling the mountain that was nearby. Only then did it stop…
Ty: “I’m so huge!”
The dragon: “All you dreamed of, I bet?”
Ty nods, then flexes: “Yeah… but I still want more.”
The dragon: “More it is then.”
The rat’s muscular growth continued, destined to be the most powerful being in the universe.