Here is a prestige class for those characters wishing to pursue the path of the dragon metamorphosis.
Basically what I have done is allow the abilities of the defiler metamorphosis spells from Legends of Athas to be applied as free factors (in terms of spellcraft DC) when gaining a level of this prestige class. At the same time the character may also add additional factors of his own, if desired.
This offers the dragons (and the avangions when I write it up) a moderate power boost compared to what is offered in LoA. The entry requirements are far stricter, though. Check out the PDF below.
https://1drv.ms/b/s!At1QqAc0yBQT3TgTf4NxT_cHmEBm
It is meant to be used in conjunction with my additional factors for the metamorphosis seed here -