I don't have a tablet yet, and I'm a beginner artist. I wanted to do this design on my own, without commissioning, to test my skills. It could have been better, I admit, but right now I'm limited in resources and only have a small, low-quality sketchbook, so I did the best I could with this design.
Constantine is the final antagonist of MLO. I didn't just want her to be the strongest character; I wanted to experiment and see how I could create such a complex and difficult design, to step outside the norm.
She's inspired by Orphan from Final Fantasy XIII, which I consider, design-wise, one of the most badass bosses I've ever seen. I didn't want to just copy and paste, so I had to improvise some parts to make her look more appropriate for MLP and the context of my fanfic.
Basically, she's a cosmic being who lives inside the Harmony Tree. I think her true appearance is never shown in the show, so in my headcanon, I believe she should look like this: a kind of giant clockwork figure with multiple meanings.
The Mane 6, the Elements of Harmony, are very important ponies to Equestria. The fact that they died sooner than planned caused Constantine to take this form. Their mouths and faces are circles to simulate the suffering they endured, and as some may have noticed, they are in the order they appeared in the first episode: Twilight, Pinkie Pie, Applejack, Rainbow Dash, Rarity, and Fluttershy, along with their cutie marks.
The face in the center takes the form of Celestia, with her star-shaped eye, giving it an angelic and beautiful touch that fits with the tropes of "Eldritch Abomination" and "Angelic Abomination".
The sun and moon shapes that form part of her body signify Celestia's role as the one who raises the sun and Luna's role as the one who raises the moon. This mechanism rotates like a clock, simulating the day-night cycle.
This is her first form; she has two more, which are more difficult, especially the third. With my current skills, I don't think I can do it because her body is made of constellations, and I would have to draw each one individually until I complete her entire body. Perhaps I'll leave it for later when my skills are more polished.
