Tiamat (Dungeons and Dragons)
The dragon goddess Tiamat from dungeons and dragons
The mortal's flesh shifted and expanded, replaced by a hardy scales that shimmered with iridescent hues. His limbs lengthened and broadened into powerful dragon legs, ending in taloned claws. Most striking of all was the transformation of his lower body; where once there had been human genitalia now there was a massive, throbbing erection that extended several feet from his body, its head flaring wide and glistening with pre-cum.
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The mortal had become a true dragonborn, a creature of incredible power and lust. He lay before the great goddess Tiamat, his new body trembling with anticipation as he awaited her touch. The dragoness smiled, amused by his eagerness. She lowered her head slowly, inhaling deeply through her nostrils as she took in his scent.
Her many heads swiveled once more, studying the newly transformed creature from every angle.