You were brought before two figures dressed in cloaks in front of an odd structure in the temple that looked like it was supposed to hold someone, though at the same time it looked like it could be adjusted. The cloaked figures nodded to the men who strapped you to the structure as the cloaked figures examined you with a smile.
"What a handsome stud," one of them said in a feminine voice as she ran her hand along your body slowly, pulling off what was left of your clothes as she did. "Not much to look at downstairs though."
You shifted uncomfortably as you tried to escape but found that the bindings were too tight. Actually, you were pretty well hung, so you had no idea what the woman was talking about, why would she say it wasn't much to look at?
"Well, we're going to have to change that, now aren't we?" The other said she was also a woman and the two of them were eyeing you like a slab of meat. "He is the one we need right?"
"Indeed," the first woman said. You tried to say something but you only let out a muffled sound through the gag. "He's got the right bloodline and so much magical energy inside him. We'll use the artifacts to make sure that it goes worldwide."
"Indeed, then first the vessel will be bred," the second woman said as she reached around and undid her cloak and let it fall around her, leaving her totally naked. "And the chosen one's seed will bring forth a new world in Epona's name."
She turned around and moved onto all fours and you gasped in surprise when you saw her pussy. It wasn't human, instead, it resembled that of a horse that winked at you. Smells hit your nose from her and your cock became involuntarily hard. You tried to look away, but it was impossible.
"You'll be just like us soon enough," the first woman said as she stroked your face a little. "Everyone will once we are done."
You tried to struggle again but it didn't get you anywhere and you let out a muffled moan as you felt the strange woman's pussy pressing against your cock. She felt so, wrong and unnatural, but somehow it just made you more and more aroused. Unconsciously you started to thrust into her and she let out a light whinny, not a moan, a full horse whinny.
"Mate her... fuck her... fill the vessel with your seed..." The first woman said as you started to move your hips back and forth. "This is what you were born for, what the Goddess prepared you for..."
You felt your thoughts about how weird or wrong this was slipping from your mind as you thrust into woman faster and deeper. You looked down at her and barely noticed that fur was now covering her body as you thrust faster and deeper. Your cock felt small like it wasn't going to come close to pleasuring the woman with the mare's pussy, but strangely it seemed to be filling her more with each thrust.
You felt an itching sensation covering your body but you didn't notice as your hands and feet seemed to become harder. You thrust faster and deeper, feeling that the structure was adjusting a little before the bindings broke and you fell forward onto the woman's back. Your mind was completely engulfed by instinct as you fucked the woman harder and harder, not even noticing as a tall grew out of your spine and your arms and legs adjusted themselves into a quadrupedal stance.
You felt your cock moving in and out of her harder as you loved the feeling. You were now fully engulfed in the feeling of mating as you threw your head back and let out a cry that turned into a neigh. Finally, you thrust into her one last time as your now massive balls churned and you painted her insides with your cum. She came at the same time as her vagina squeezed and drew out all of your cum, and suddenly it felt like waves of energy was sent out as your human mind faded.
You pulled out and dismounted from the mare as you admired her. She was a beautiful reddish brown mare with a darker mane and you nuzzled her gently. You turned to see a white mare with a grey mane where the woman was standing before.
"Welcome to the herd, chosen son of Epona," the white mare said as she nuzzled me gently. "Now, what shall we do with you my handsome stud..."