I have a Ryori egg that has a cool mist around it... but it might be special idk, please let me know

Ryoris (along with Griffis for the Winter Fest, Aeridinis for the Spring Fest, and Lighiras for the Summer Fest) are Seasonal Fableds, which means that they're only available in the wild during their respective fest, so they have special eggs! Ferrikkis, Nephinis, and Ny'venes are also fabled, but they're not seasonal, just rare and can only be found in certain areas. Ny'venes, for example, cannot be found anywhere in the wild. Here's a nice guide by Scathreoite if you need more information: https://www.sylestia.com/forums/?thread=67313&page=1#8

That is how all Ryori eggs look.

For instance, Aeridini looks like this:



Ferrikki looks like this:



Griffi looks like this:



Lighira:



Nephini:



Ny'vene



And finally, Ryori: