"Ancient Lights"

These horses only appeared in collections released before the herds were included in each card or their herd was never clarified.
 * Achilles
 * Aphaia
 * Ceres
 * Clio
 * Cupid
 * Cybele
 * Demeter
 * Diana
 * Echo
 * Eirene
 * Epona
 * Gaia
 * Hera
 * Hestia
 * Juno
 * Jupiter
 * Opis
 * Pandora
 * Persephone
 * Selene
 * Thalia
 * Vesta
 * Eurynome
 * Hecate
 * Iris
 * Janus
 * Naiad
 * Neptune
 * Triton
 * Euros
 * Mirth
 * Serenity