Spells for turning someone into a demon...

In my book, there is a girl who is dying from leukimia, and her best friend is a witch. So, the friend is trying to save the girl who is dying by doing a spell to turn her into a vampire, because they are immortal and then she wouldn't die from the disease. But the spell goes wrong and the friend accidentally turns the girl into a demon.....
So, i was wondering....
Could anyone give me a spell that could look like its for trying to turn someone into a vampire, but then has a few words or lines that refer to demons so that the spell can go wrong?
The spell needs to have the name Cybel, and then the name Nasim. Also, it has to mention the Daughters of Spirit and Daughters of Fire, and then again Daughters of Dark, which means demon. Also, it needs to start like this:
To the dark, the moon, the stars and Cybel
I plead thee you find thy empathy
In the illness the blind men can’t cure
One touch of your heart is the cure to the all,
An innocent life will be spared from the throne.

Just take that, stick it into Google Translate, and pick a random language not many people speak. Latin is common for making up spells.

Though I do have my personal opinions on the aspect of demons and demonic activity I think that it would be best to pose this question in the Mythology and Folklore section. What you are asking does not seem to pertain to any paranormal encounter and the Mythology and Folklore section is probably your best bet as there are those who frequent there who may be better at responding to this question. No offense, just trying to point you in the right direction.