"Bull," she whispered in his changing ear.
At once, his body began to take on a shape befitting a creature of ultimate male fertility. His frame swelled quickly, Eric moaning in a deepening voice as his shirt tore off, unable to cope with his swelling muscles and larger frame. His pants followed next as his thighs rapidly gained mass, and soon he was left with nothing but his underwear as he tried desperately to hold on to who he was while the magic remoulded him.
It was all in vain, though. His memories of his human life, his old worries, his career, all were washed away in the tide of green magic as it claimed him for the Vernal Queen. His testicles pulsed and swelled, filling with magical seed which would spread the Spring Goddess' dominion. His mating-tool gained both length and girth, a thick glob of pre-seed oozing out of it as it grew outward, shredding the last of his clothing and leaving him gloriously naked, panting, and transforming before his goddess.
Witnessing the transformation, she laughed with joy, and was already becoming wet with lust, seeing this strong male beast entering reality. "Become, my Golden Bull. I promise you pleasure beyond your wildest dreams. Your seed will spread to the ends of the Earth."
He moaned again, louder this time, as the magic intensified, a sound which became a roar as his face and head were warped and transformed by the goddess' will. Two small, sharp horns erupted, poking up from beneath his shaggy golden mane and slowly growing until they were larger than any wild bull's. His neck thickened, his features pressing forward into a bovine muzzle, and as he breathed the scent of his goddess' arousal entered him, fueling the changes further.
Golden fur conquered most of his shivering body, a strong tail ending in a golden tuft growing out from his lengthening spine as his body swelled to massive proportions. He was stronger than any human male could ever hope to be, and still he felt his power increase. He bellowed at last, the sound he was always meant to make, and his penis, the long, thick tool of a beast, stood at full attention as his transformation finally completed.
He stood, still trembling slightly as his new body became acclimated to itself. Velistia considered him... a glorious, golden minotaur, reborn to fulfill his male destiny. He would breed with many, in accordance with the will of his Queen, and wildness, fertility and magic would fill the world once again through him.
She was drawn to his cock, to the scent of the magical seed which swelled his balls and leaked from the tip. She bent down, grasping the base gently with her hand and sending a thrill of energy through her new he-beast. She tasted it with her tongue, making him low, and she felt the pure magic within, her own magic through a masculine mirror, virility to her fertility. He was now perfect, now worthy to be her consort.
"Eric is gone," proclaimed the goddess, and it was true. "I have freed you from your humanity, your cares, and you will also free many in my name. Now, you are now Libertas, First Bull of the Goddess. You shall serve me, as males were meant to serve. Now, I command you to..."