Arion are an extremely swift, nearly immortal bred of horse. Many stories have circulated over the centuries as to their origin which is generally blamed an a cadre of gods behaving badly. All that is known for certain is that the bred originated in Arcadia. They are recognized my their black or fiery red manes, the lightness of their steps, and the speed at which they are able to run.
The cost of care and feeding an Arion has relegated them to the wealthy, but they are still prized steeds on account of their unmatched loyalty, nobility, and speed. They are able to run across anything their hooves can touch, including water and the tops of plants.