Was surprised to see there wasn't an Illustrious lora for this classic tv transformation. From the Aladdin TV series episode Eye of the Beholder, Jasmine cursed into a snake/naga/lamia.
A couple of important tag notes. "Green Skin" and "Yellow skin" get you the proper skin color. "Snake Hood" for the cobra hood in place of hair, "Black Hair" and "Long Hair" to get the hair instead of the hood. If you want the human skin tone on the face use "humanface" in your positive prompts and lower the strength of skin color tags. If you want the snake coloration on the face use the tag "Sn4kef4ce"