You soon appear in the middle of vast plains, in the distance you can see herds of dinosaurs walking around in groups, there's no grass, only some prehistoric shrubs and trees.
You try to find the genie, but in your search you stumble upon a green oasis instead. You approach the water source, but soon hear a loud noise. A huge triceratops is growling at you. And behind him there's a herd of about twenty more triceratops that seem pretty angry at you for being too close. You try to back up, but soon the large triceratops chases you. You can barely make it alive as it pushes you far away with the side of one of it's horns. It keeps roaring at you as you try to stand up and run with your bruised knees and hands. Luckily, they leave you alone once you're far away enough.
You're now lost in this dangerous place, and you can't do anything but wander around with the hope of seeing the genie again.
Walking around for a few hours, however, you feel a bloating sensation in your guts, and then a throbbing sensation all over your body.
You gasp as your stomach widens and expands, followed by a crunch in your ribs, your whole torso starts to widen and become round, taking a sturdy barrel shape.
Your torso grows immense, bigger than an elephant's, and you start piling up the tons, your weak human legs and eventually also your arms can't hold your body anymore and you fall to your side with a loud thump. Your ribs widen even more, and your tiny human limbs and head hang from a giant torso.
After this, you feel your spine throb and lengthen, and looking down you see a stubby new tail past your immense belly. You try moving it and manage to trash it around, side to side.
You growl in discomfort after feeling an enormous pressure in your arms and legs, as if they were exhausted after running miles and you kept demanding work from them. Soon they start to lengthen, and gain strong, wide muscles. Your legs become thick and wide, in both limbs, your fingers and toes become stubby and short, your nails thicken and extend to give you the appropriate support for a large animal like yourself. With your new strength you're finally able to flip to the side, finally standing up in all fours.
Soon you look like a large, strong triceratops from the neck down, and soon your skull throbs too.
It starts expand along your nape, and your nose and mouth merge into one, and expand forwards forming a muzzle, soon you grow a strong shield-like frill.
Feeling a strong pressure in the top of your nose and forehead, horns make their way out of your skin, you can see them in your vision, giving you the famous appearance of your new species.
You soon feel itchy all over, as your soft human skin becomes thick, leathery scales. It starts in your torso and grows to become a light green color with dark green stripes and details. Your eyes tear and you close them forcefully as they become simple herd animal eyes, you can only see from your sides, and it takes time to get used to it. You get distracted from this, however, as you feel a puckering sensation in your backside. You soon realize your rectum is expanding and becoming a cloaca, this is extremely uncomfortable, but not as much as the next change, as your genitals get wrapped in thick leathery skin, your new sheath.
You can feel testicles growing in them, becoming thick, large, and full of your new, and at the same time, ancient cum. Your rear legs spread and you gasp and growl as you can feel change in your genitals. A still human penis is pushed out of the sheath, looking embarrassingly small in the rest of your dino body, the pressure in it is enormous, but you try to hold back, this is the last remaining part of your humanity. You pant and moan in your new bestial voice as it starts leaking precum and your hips betray you trying to hump the air. You close the eyes as you struggle to keep control.
You hear someone yelling though, you open your eyes, getting dizzy, as you see the genie yell something at you, you can barely hear it in the daze you're currently in. "Give in! Don't hold it back!" is the only thing you can distinguish. You ignore it as you think it's just a trap to turn you into another one of his dumb animals.
You roar in pleasure as you feel your testicles expand and throb. Unknowingly to you, all you're doing is storing years of triceratops testosterone in your body, which the genie used to transform you in the first place. This leads to a sudden growth burst, you whine in pleasure as you grow several feet larger, become even wider, and gain even more muscle mass, your leg muscles easily visible and bulging huge, as you press against the ground in your struggle. Your scales and thick skin become even thicker, and it's colors brightening into a warmer, more colorful set of colors. You groan again as your frill and horns extrude larger and more dense.
You keep holding the change in, blueballing yourself as your testicles fill with even more cum and testosterone. You soon tower over the other triceratops, your muscles bulge into obscenity, including your thick torso and neck muscles which give you a frightening and intimidating appearance. Your frill is huge too, expanding in all directions and growing spikes at the ends, your horns are large and extremely dangerous, each one almost the length of a jeep. Your color has also become extremely warm and bright. It's taken yellow, red and orange colors, with purple stripes and details.
You feel really good, you feel unstoppable, like an alpha. No. You ARE the alpha. You grin as you imagine going back to the triceratops herd, pushing all the wimpy males away, and claim all the warm, fertile p-...
You shake your head. What are you thinking? You aren't a dumb animal... You aren't an animal... You're... Not...
Thinking becomes hard as your brain is overwhelmed by the hormones. You thrust your hips once more and let out the loudest roar you're capable of as your penis EXPLODES into a long, thick red fucklog that reaches your belly, it's girth is the size a tree trunk, and it's spitting out all your human load out, including your inhibitions and knowledge. It's soon followed by thick, chunky yellow dino cum. You stand up again and shake your head as the daze fades away and your massive meat retracts back to it's sheath.
Ignoring the calls of the genie, you gallop away not minding a thing. You have nothing to worry about, you're the largest triceratops to ever exist. Your thoughts are only based around eating, fighting other bulls and possible predators, and fucking a tight willing female. You grin with this thought as your massive cock briefly flops out of its thick sheath, dragging across the dirt, leaving behind a stinking and steaming trail of sperm.
You walk around some more before you stumble upon the herd again. This time, they look small. Weak. You walk with confidence towards them, your powerful legs and paws causing tremors. They can only look at you in awe and fear, they move aside as you move through the center of the formation. Soon, you reach the front. You expected to find a spot to join in, but they all moved aside and stood behind you. Looking back, you see the whole herd watching you. It doesn't take long to realize. They're waiting for your orders. No one has questioned your right as the alpha. You simply are the superior specimen. You roar and move forwards as the rest follow you. This feels right. You're the alpha. You've always been.