Not to argue, well I lie; to argue a bit with that statement.
Even Winds of Change which is level 60 only has the base effect of changing targets into an animal.
The thing I am trying to get across is that Shape change, and fire creation are not even in the realm of similarity of the same spell. Requisites only apply to a spell to get the end fucntion of the spell.
No matter how you rationalize requisites, it's not happening . Anymore than I could likely create a high level spell that lets me tunnel through the earth, pop out at will and sling lightning bolts.
The idea is funationally the same. In the case of the Dragon Form, one is a Muto Corpus, and the other is Creo Ignem(For flame), versus my tunneling human[varying techs plus Terram] with a static personality[Creo Arurm]... so to speak.
If being a Dragon REQUIRED Flame as a requisite. You could use it as a requisite, but it still wouldn't allow you to breathe flame.
The sheer fact of the matter is, this little charade is going to require two seperate spells to get the desired effect.
Now if you want to change to the physical form of a Dragon that has living Flame for a skin? THAT, I would buy as a Muto Corpus with both Creo and Ignem as requisites. Required ones as a matter of fact, both adding a magnitutde to the spell no less(PG.114)
NOw creating a Drqgon WHOLE CLOTH, not changing into one. is a difffernt matter entirely. UNder Creo Animal it's a Level 50 effect with requyisites adding to create the extra desired powers.
The only reason it works this way for that effect is that you are trying to creat ethe animal itself in it's entirity, which alows for the requisites to make up the extra powers. The proposed Human to dragon is not a creation whole cloth, but a mutation of an existing form.
Magic Item
Muto Corpus
Change a Human into Land Animal Lvl.10 [Animal Req]
Change a human into a Fish or Bird Lvl.20 [Animal Requisite]
Base 30 [?] Lvl 20 +5 for ANimal, [+5 for animal bird style mix?]
Range
ersonal [+0]
Duration :Concentration [+1]
Target :Individual [+0]
Modifiers
Frequency :1 Use p/day [+0]
Maintains Concentration :+5
Size :+8
Total Level :75
Effect - Change to phsyically become as a Dragon.
At best guess to assume the form of a dragon. But it doesn't change the stats of the person changing form, who may very well be incapacitated by the size of the beast.
The Animal form[Pg.132] also does not appear to take into account the possibility of a fantastic creature form. Making allowances only for common animals in the effects lists.
This also does not take into account the power of flight, or the ability to breathe fire.
Seems to me a nice little Imaginem spell mixed with a flight spell and flame creation spell in a magic item would get the same results over all, for far less experience, and would be far easier to achieve.