I've recently got in my mind an idea of a story when the main villain or some side villain is Lord X but designed as if he originated from an mlp creepypasta. Since he's an alien in his lore it wouldnt be that far fetched if he arrived in on equus instead of mobius. Currently getting a commission done of a few designs of what he'd look like. Does anyone know of any good stories containing Lord X as an mlp villain anywhere?

No but when I think about it sombra would be good candidate because he can appear anywhere and it being in the crystal empire gives me the thing vibes