Rule 34 Dev - cave cavern crystal cutie_mark female feral fur gem hair horn lying on_front outcrop purple_hair snow solo subsoil white_body white_fur vest_(artist) friendship_is_magic hasbro my_little_pony mythology rarity_(mlp) equid equine mammal mythological_creature mythological_equine unicorn 16:9 2015 4k absurd_res hi_res widescreen|3861967130