Harmony - Troop Symmetry

I just recolored it, and there were many options. I tried coloring it yellow and also the remaining parts of the ears, teeth, and tail, but I ended up with this version – in my opinion, it's the most concise. There was also a light blue option, and the thorns were white with a slight yellow tint, like bone – I wanted to use it in place of the crystalline one, and the skeleton and textures of the crystalline dragon would become the basis for the dragons of Erathia.

Added 2 minutes later
Emerald and crystalline are different enough to separate them by race – one has long ears, the other has some kind of horns, and the crests on their backs and their overall faces are also different – the crystalline one looks like it has a beak.