2017 animal_genitalia blue_eyes caelthar claws collar detailed_background digital_media_(artwork) dragon erection feral fire forest genital_slit glans glowing grey_scales grey_skin grin hi_res holding_penis knot looking_at_viewer male markings membranous_wings moss mushroom nitrods outside penis pink_penis prehensile_tail runes scales scalie side_view slit slit_pupils smaller_version_at_source smile solo spread_wings standing sunlight toe_claws torn_wings tree vines western_dragon white_scales white_skin wings