The VOIDRUNNER'S CODEX is coming! Explore new worlds, fight oppressive empires, fend off fearsome aliens, and wield deadly psionics with this comprehensive boxed set expansion for 5E and A5E!
Since "feia" is Latin for fey, it could be used for the genus name for fey with no real analogous creature type, AND as the species name for creatures that do.
I think you're on a good track, but I'm thinking something like...
Medeisvivens ("magical life") as the genus name and a latinized spell name- or even an abbreviated form of the spell name- for the species name would work.