I know I've said some of this before, but here is her own post.

As much as I love the Legion of the damn ferra/Ferrus headcannon, I wanted to think outside the box and so I thought what if Cawl or a rouge Techpreist (maybe under the influence of the Void Dragon) sought out Trazin/a mad scientist necron(sorry not the biggest necron fan) and in exchange for some rare artifact they would work together to bring Ferra back.

Also I have a great story idea that's really grimdark! So a Necron is an exact copy of the soul before it would usually get consumed, well what if they only "copied" Ferra's soul and her real soul is actually leading the legion of the dammed

Freya(Leman)- Wolfen

Atlantia(Angron)- Lioness deamon

Cora(Corvus)- Crow deamon

Mortica(Mortarion)-Insectiod (preying mantis, centipede, fly)

Hestia(Vulkan)- A giant salamander dragon (no wings)

Ferra(Ferrus Manus)-Necron reserected (biotransferance)

Sanguinia(Sanguinius)- Mantacore but snow lepord instead of lion

Fulgrim- Deep sea fish/siren

Kassandra(Konrad)- Vampire Bat

Magnolia(Magnus)- elder mummy litch or Owl+Peacock?

Jagathai- actual war hawk or cheeta?

Petra(Perturabo)- Deamon engine

Hathor(Horus)- ?

Renala(Rogal Dorn)- Yeti(?)

The Lioness (The Lion)- Chimaera

Juno(Robuté Guilliman)- Bovine/Cow/Minotaur

Arellia(Logar)-Goat/"sacrifical" lamb

Alpharia/Omega(Alpharius and Omegon)- ?

If you couldn't tell, this is not a complete list! And for the question mark ones, please feel free to submit ur ideas! (I am trying to avoid the obvious choices, i.e., The Lioness being a lion, but I'm open if you have a unique spin)

Here we got Hestia (fem Vulkan) as her evolved form a true Salamander. Though I didn't use any salamanders for the design. She's definitely going to be one of the more feral and beast like ones.

One fun thing I thought of, was the grimdark irony of the primarch most associated with hugs and physical touch being covered in spikes. Also, her saliva is pure magma that her rough scales carry to her mouth

Lily(Nickname for Morticia's SO) spent days making this outfit for Morticia. And tailoring clothes from scratch for her girlfriend, who is a 12 foot tall demigod, isn't the easiest thing in the galaxy.