Advice needed

Don't bother to argue with your friend. Allow her to believe whatever she wishes.Don't worry, she will never turn into a dragon.

Just let her do the "Spell" and hopefully she will see that it was fake.
If she tries another transform spell hoping to change, then I don't know.

If she cannot tell the difference between reality and fantasy, then she needs serious psychological help.

This happens to people, they get so caught up in their own realities that they swear to the grave that it's all true. If you try fighting their beliefs you won't succeed. Be patient and if your really concerned she can be drawn away from such a path but only with subtlety and understanding. Let her realize on her own.

Let her do it. When she gets sick from eating raw meat and ends up in hospital, she will have learned her lesson.

First, raw meat IS a dead animal. Second, the spell won't work, at lest not like she thinks. A few questions you should ask yourself seriously:

Is your friend psychotic? If so, get her help. Is she messing with you? If so, I'd say give her some raw hamburger fresh from a butcher and let her do the spell with you there. Why does she WANT to be a dragon? Use that answer to address the issue.

From the posts given, I feel like I should drop it with her.

And no, She's not psychotic, nor schizophrenic, however she reads the Twilight novels and Eragon trilogy, so that could be toying with her.

Plus, she's more of a kind to believe everything.

If she does the spell, and it doesn't work, or if she ends up in the hospital, then I hope she will know that it's not happening.

Humans can't transform at least not without a lot of negative side effects, The spell is probably fake, honestly I want to know who would create a fake spell that required eating raw meat and a dead animal, only let her try it if she ultimately will not listen to reason, and maybe not even then because no matter what raw meat can wreck your body, honestly no offense to your friend but if I feel she may need help.

Mossgoth, if she does the spell, she may think it worked and that she now has a dragon spirit. I've met people like your friend before. They play into their desires and make the unreal real to them. I think you are right to drop it, but if she keeps it up, you may want to be with her to make sure she doesn't do anything really dangerous, like eat road kill or something. Best of luck to both of you :)

Your bio says you are 14, so it is likely your friend is a similar age and experiencing the last of childhood fantasy and imagination. It is up to you to decide if you want to continue playing make believe or if you want to go forward with maturity.