Rule 34 Dev - cutie_mark eyelashes female feral grey_background hair hooves knife leaf long_hair quadruped simple_background solo tail cold-blooded-twilight friendship_is_magic hasbro my_little_pony diamond_tiara_(mlp) earth_pony equid equine horse mammal pony 1:1 2024 greyscale hi_res monochrome|23339543745