A white dragon

You had decided to combine her with a red dragon. You had the woman strapped naked onto a table. She was a little difficult at first, but after you cast a dizzy spell on her she was much easier to handle. The ritual could begin.

You collected some chips of a dragons claws and scales and placed them on the woman's stomach. You placed your hand over her it and summoned your magic. This put an ethereal glow over your subject. The woman started to become worried and asked "What are you doing?"

You chose to ignore her and continue the spell.

"Stop it." She said softly.

You continued to ignore her and persisted the spell.

The woman began breathing heavily. She felt something was happening to her.

"Stop it! Stop it, please! Somebody, help me!" She tried to say. She was too dizzy to resist at all and was completely at your mercy.

Finally the preparations were complete. The merging could begin.

The woman's stomach became like liquid, allowing the claws and scales to disappear into it. While they were absorbed by the woman's body, she started to change.

Her skin changed into scales. Little scales grew all over her body, making it sturdier, yet remained soft to the touch. Her hands and feet however changed to be more reptilian. The scales there were larger and white, with matching claws on her toes and fingers that replaced her nails.

She then grew a long thick tail. Large white scales grew on it. You had no doubt there was enough muscle in this tail to be used as a fifth limb.

Then came her wings. As these wings grew from her back, her body was pushed upwards. They grew until the tips were above her head and the bottoms reached her knees.

The last thing to change were her eyes. Her irises became red and pupils elongated.

Once that was done, the merging was complete. You ended the spell and retracted your hand.

You had turned the woman into a draconian.