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2025 3_heads anthro breasts canid canid_demon canine canis claws clothing collar costume costume_transformation demon digital_media_(artwork)domestic_dog english_text female gender_transformation genitals genitals_shrinking growth halloween halloween_costume hellhound holidays horn horn_growth human human_to_anthro kneeling mammal merging mtf_transformation multi_head mythological_canine mythological_creature mythology navel nipples open_mouth oter pawpads penis penis_shrinking red_eyes red_horn shocked simple_background spade_tail species_transformation spiked_collar spikes surprised tail text transformation transformative_clothing transformative_collar verbal_reaction_to_tf