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2025 3_heads anthro balls breasts canid canid_demon canine canis claws clothing collar costume costume_transformation demon digital_media_(artwork)domestic_dog english_text ftg_transformation fti_transformation gender_transformation genitals growth gynomorph halloween halloween_costume hellhound holidays horn horn_growth human human_to_anthro intersex kneeling knot mammal merging mtg_transformation mti_transformation multi_head mythological_canine mythological_creature mythology navel nipples open_mouth oter pawpads penis red_eyes red_horn simple_background spade_tail species_transformation spiked_collar spikes surprised tail text transformation transformative_clothing