Resized to 61% of original (view original)
Artist's commentary
Tempest Shadow
Tempest Shadow / Fizzity Boppity from the My Little Pony Movie.
Since humans don't have horns (Futurama notwithstanding), the idea is that she lost her arm in the fight with the magical space bear, and so she has an incomplete artificial one made up of fragments and held together by pure force of magic.