Firefly

You can breed the following firefly classes:

(very common) Firefly
(common) Hunter, Oracle
(uncommon) Knight, Jester
(rare) Lord/Lady, Tinker
(very rare) Magi, Shaman

What Do Classes Do?

Tinkers restore tokens to your accessories.
Hunters kill spiders.
Oracles heal the injured.
Jesters boost social stats.
Knights boosts morale.
Lord/Ladies boosts loyalty.
Magi boost the S+ stat.
Shaman make items last longer and restore mating tokens.

Wing Types

You can breed the following firefly wing types:

(common) Gin, Kin, Jin, Yin
(uncommon) Sor, Kor, Ror
(rare) Suu, Kuu
(very rare) Mox, Pan

Sizes
Size affects their pulse/glow size, NOT physical size…they stay the same physical size forever. You can breed the following firefly sizes:

(common) Tiny, Diminutive, Small
(uncommon) Medium, Large
(rare) Giant, Enormous
(very rare) Grandiose, Dwarf

Radiance
Radiance affects how brightly they glow/pulse. You can breed the following firefly radiances:

(common) Dull, Pale, Soft
(uncommon) Normal, Strong
(rare) Bright, Intense
(very rare) Radiant, Dazzling

Other Mutations

Alongside of Wing Types, Radiance and Classes, there are other firefly mutations. These include wing, particle, body and the Eternal mutation.

The Firefly v18i Update included all of the previous v18 updates, along with the following additional changes:

C L A S S E S
The Invocation particle mutation (see below) can unlock Elementals
Elementals are infused with powerful magical energy and can give that energy to Embers,
increasing the speed at which Embers generate Fairytale Ranks.

B O D Y
* Monster Body mutations has been implemented!
20+% Monster Body can also unlock Behemoth, and Behemoth can unlock Titan

The following mutations have been added to the general pool of body mutations:
        RainbowE, RainbowF, RainbowG"                
        Topaz, Sapphire, Emerald, Ruby, Amethyst, Onyx, Alabaster"

P A R T I C L E S
20%+ can unlock Archmagi;
Archmagi can unlock Pattern and Formula
Pattern+Formula mated together can unlock Invocation

W I N G S
* Holiday and Infernal wings have been corrected!
The following mutations have been added to the general pool of wing mutations:
        "GossamerA, GossamerB, GossamerC, GossamerD, GossamerE, GossamerF, GossamerG, GossamerH,
        "ColorfulA, ColorfulB, ColorfulC, ColorfulD, ColorfulE, ColorfulF, ColorfulG, ColorfulH",
        "CoronataA, CoronataB, CoronataC
        "DaisyA, DaisyB, DaisyC, DaisyD
        "SplashA, SplashB, SplashC
        "TropicalA, TropicalB, TropicalC, TropicalD
        "CicadaA, CicadaB, CicadaC, CicadaD, CicadaE, CicadaF
        "SpectrumA, SpectrumB, SpectrumC"
        
The Holiday seasonal wing can unlock FestiveA through FestiveH