"Treasures"

These horses only appeared in collections released before the herds were included in each card or their herd was never clarified.
 * Aheron
 * Ariadne
 * Cara
 * Firebright
 * Hellevi
 * Honu
 * Icarus
 * Knight
 * Mahina
 * Memory
 * Merrydancer
 * Mikiko
 * Nightingale
 * Peregrine
 * Rosamund
 * Sapphirine
 * Tramontane
 * Haruki
 * Lily