Can someone explain to me how to fully use the sculpting additives. I decided to open a premium catalyst and I received a Twilight Deity Lighira catalyst, to my understanding these are rare? With this knowledge I don't want to mess up and not give it all the traits.

I think genes are things like body patterns, different tails/ears and mutations are things like horns and wings? I'd like to know what slot corresponds to each body part, if explaining this all to me isn't too much trouble, thank you if you can help.

Yes, they are rare, so congratulations! If you go to the generator, and select a lighira, you can see what possible traits are possible for each slot. What you get from each slot is random, but if there is a slot with a lot of traits you like, then I'd pick that one! :)

P.S.
If you can find some sirens tears (8 maximum), you can make your pet much stronger--a perfect battle pet for your party!

It should also be noted that Twilight Deity Lighira can only have up to two of four specific traits.

Majestic themes (for this fest, Twilight Deity Lighira, Sun-Kissed Dryad Lunemara, and Celestial Champion Qitari) can only have the traits from their specific Restricted trait set, and can have a max of two (if you use a Prismatic Pearl. Non-Majestic Themes get three traits if you use a Prismatic, but Majestics do not)
> No pearl = 1 carry
> mundane pearl = 2 carry
> golden pearl = 1 vis
> prismatic pearl = 2 vis



The four traits that this Theme can have are:

G3: (MM) Ancestral Deity Runes

M1: (JJ) Ancestral Deity Saddle

M2: (GG) Ancestral Deity Cape

M3: (HH) Ancestral Deity Crown


If you need to know more about Restricteds/Majestics, guide here (not updated for the three new majestic themes yet, but the Restricted trait sets were released last year, so those are there)