In days long past, the gods would our world bestowing their gifts and magics upon those willing to receive it. The gods granted them magic items, weapons, longevity, and even changed the shape of some humans to mythic beasts. The gods eventually retreated from our world to their own or other planes, taking most of their magics and most loyal creatures. However not all were taken. Among the following of Dionysius was a former human shepherd turned satyr named Astyanax. Astyanax had displeased his patron god by stealing from his private wine cellars. As punishment Dionysius left Astyanax in the human world with a mission; a mission to turn 1000 humans into satyrs to eventually be sent to his patrons plane. If Astyanax could manage this he would be welcomed back to Dionysius's side as chief of these 1000 satyrs. This mission however, was not an easy one. Due to the gods departure, the worlds levels of magic grew low. Only certain humans with enough magic to stir in their blood were capable of being transformed. This meant Astyanax's mission would be a long one.
Thankfully as a satyr, time is less of an issue. Dionysius was sure to grant Astaynax a longevity to take him through many eras. Though he does still age, taking on more goat like characteristics and features as he does so.