"Feral dragon," you said
"Okay," the voice said," any preference on lifetime, abilities?"
"How about 1,000,000 years for lifetime, and let them all breathe fire but the color depends on scales." You said
"Brace yourself then the transformation is starting." The voice spoke
You almost immediately fell to the ground when your spine cracked moments after the voice finished speaking. You then started growing bigger, almost the size of a horse, and you saw black scales growing all over your back, and you looked down to see your penis shrivel until it was gone as ash gray scales grew around your new vagina. As the changes continue you aren't able to keep track of what's going on, and you feel your wings and tail grow in. You were drawn to your hands as they became claws with four toes, and your feet became three toed claws. Your head reshaped giving you a draconic muzzle, and in your mouth you grew sharp teeth and a forked tongue. Spikes then grew up your back creating a stabbing feeling causing you to roar in pain your voice sounding female as you took attention to your new slender form as the final parts of the transformation completed.
You had the urge to explore your new body so you saw your tail and got the idea to use it in an interesting way. You plunged your new tail into your new pussy causing you to roar in pleasure as you moved it around inside your vagina. You eventually stopped when you spewed out black and purple fire from your mouth.
"That rush, that urge, those instincts, the pleasure...." you hissed to yourself
"Are you ready to go?" The voice asked
"Yes, but can I see myself first?" You asked
"Of course," the voice said and a mirror appeared in front of you.
Black scales, purple eyes, curvey body, large wings, and a wild tail are the words that you used to describe yourself in a nutshell.
"Now what life do you want to have?" The voice asked