The 19 year old had heard of Epona's ritual and was intrigued by it due to possessing an internal transformation fetish that plagued him and prompted him to take such decisions as going in a clearing in the middle of the night.
After finding a forest and walk g for some time completely lost he found a clearing.
He took off all of his clothes and and placed them in a pile.
He entered in the clearing with nothing on him and started to prepare the celtic symbol on the ground of the clearing.
He carefully drew it and arranged the candles in a circular pattern after making sure they were properly positioned and then he light each one individually.
At this point he was getting aroused due to his wish of becoming a horse, however he couldn't keep his desires secret from Epona.
As he laid in the middle of the circle he was at full mast while thinking about what was going to happen.
Mark had always wanted to be a horse, but he couldn't quite picture himself as a stallion and would often jack off at the taught of becoming a mare and trembling under a stallion.Truth be told he wasn't planning on running away.
As he started jacking off to the taught of his dick turning upside down and becoming a pussy he was on the verge of cumming. At that moment he started edging himself while saying:
Epona hear me, I wish to become one with your heard but not as a stallion fitting my gender, but as a mare, fitted to be bread by your stallions.
As he said that he pushed himself over the edge and spewed ropes of cum in the air that landed near him and on his belly.
He still was jacking himself off while standing up and saying.
Well this was a waste of time at that precise moment all of the candles blew out simultaneously.
As that happened he heard a distant whinnie and the heavy pounding of hooves.
I shall present myself to you, my only request is that I become one of you.
He stood there for a further 20 seconds with his erection still at full mast as the rithmic pounding of hooves was getting closer.
The figure of a large black horse with red eyes could be seen advancing towards you.
You shuddered when you saw his red eyes.
You remained firmly in the circle while holding your trembling member.
Then you saw it, a large black draft horse with a black mane and red eyes slowing down and approaching you in a canter.
He remained outside the range of the circle while circling it in a slight gallop while periodically changing direction.
He looked at you with his red eyes and realized that his equine cock was coming out of its sheet while looking at you.
It was a stallion, meaning that you were his mare.
Your member twitched while looking at the stallion while understanding what that meant.
You got close to the circle and looked at him.
At that moment the stallion snuffed and stepped inside the circle and grabbed your ankle dragging you down along the floor until you were outside.
He let go of your ankle and placed his heavy right forelegs on your chest.
The next thing you saw was his large head descend down and lick your human member taking it in his mouth.
Your immediately started moaning as the stallion's eyes glowed and yor member was getting closer to another orgasm.
You twitched in his mouth until you came again with a large moan.
He kept up his ministrations until you couldn't feel your member in his mouth anymore.
He removed his muzzle and licked it, and then looked around as if waiting for something.
When you looked down you realized why you didn't feel anything. Your cock and balls were gone, replaced with a slit that ran all the way to your back and that possessed a dark colour.
You couldn't believe it,he had sucked away your manhood as if it was nothing.
You then looked where the stallion was looking and saw a young woman smiling whose face was covered by a black hood.
He was still waiting with his black hoof placed firmly on his chest.
When the young woman gave a wave of her hand the stallion lifted his hoof, and chomped down on his ancle again to drag him away.
He dragged him on his back until a certain point when his ancle slipped free and then started dragging him face down.
The stallion dragged him until he reached a fallen tree. He dragged him halfway along the log and left him there.
The stallion started breathing around him with his hot breath and nuzzling his back.
Then he stepped over him as he could feel his hot belly with his back.
As he looked forward he saw the massive legs of the stallion bulked up with muscles and ending in 4 heavy black hooves.
He grabbed the front legs with his arms to inspect them in admiration and terror while saying, is this how women feel under men.
His neck was then chomped down and tilted downward by the stallion as he lined him up while his legs were pacing.
He felt the stallions member trace your backside and then as he found his mark, your equine pussy's lips, he pushed in while causing you to moan and to tremble.
You brought your hands from his legs to your belly as you felt his cock drive deeper into your pussy bulging your belly outward.
As the transformation was pushing on and your belly was getting larger and more barreled out he was pushing deeper and deeper keeping you on the edge while trembling.
As the transformation progressed your legs lengthened and started growing black masses at their ends, as you lost your feet in favor of hooves.
You started gaining a black coat of hair with black fuzzy hair around your hooves.
As you were tracing the outline of your belly your hands started to bulk up and lengthen whe saying:This is it, I don't need you anymore, hooves will do from now on.
As he said that he watched his fingers get darker and crack together while a greish substance started engulfing them and turning them into cup like shapes, your forehooves.
As your belly was getting deeper the stallion started pushing back and forth slightly rocking your head.
A woman with a black robe descended from the hill and started looking at your face and playing with your hair as your head was rocking back and forth.
What's your name dear?
The boy answered between humps:
MA-... rk. hmm,Markhmm
The woman went to your back and patted your belly which was swollen from the stallions member being accomadated by it.
You are a young man no longer Mark.she said as she came back to your face and played with your hair some more,twisting it.
Just remember you called upon me to turn you into one of my fillies with your erotic thaughts.
Ammhh, hhhmmmm, mmmm.
Ammmmhaaaaa. (Moaning)
He closed his eyes and opened his mouth as he was rocked back and forth by the stallion and brought to an early orgasm, as his head pushed on his brand new cervix.
By the looks of it you are enjoying yourself. You shall know real pleasure in my kinkdom.
As she said that she turned around as the stallion started maxing you out as you felt your head start pushing out into a muzzle.
Your mouth pushed out and combined with your nose to form a muzzle while your eyes moved to the side of your head and your ears moved on top of your head. Your changes finished as the stallion climaxed and spilled his load in your pussy pushing you down as he laid on your back with all of his weight.
When he dismounted you stretched your hooved legs for the first time and looked at the cum coated log on which you had been bred.