A magnificent kelpie, depicted in its equine form, has a powerful, muscular build with a coat of slick, deep charcoal black that appears constantly wet and glistening. Its eyes glow with an eerie, phosphorescent green, and its mane and tail are composed of swirling, dark kelp and water weeds, giving them a viscous, flowing texture. The horse's hide feels cool and slimy to the touch, reflecting its aquatic nature, with water droplets perpetually clinging to its surface.