Rhiannon's Saddle

Origin
Rhiannon is a major and classic figure in the earliest prose literature and mythology of Britain, the Mabinogi. She is a strong minded Otherworld woman, who chooses Pwyll, prince of Dyfed (west Wales), as her consort, in preference to another man to whom she has already been betrothed. Her white horse is able to outpace Pwyll’s best horseman, moving for days at only a slow trod.

Rhiannon is highly intelligent, politically strategic, and famed for her wealth and generosity. Their son is the hero Pryderi, who later inherits the lordship of Dyfed. Rhiannon as a mother endures tragedy when her newborn child is abducted, and she is accused of infanticide. As a widow she marries Manawydan of the British royal family, and has further adventures involving enchantments.

Effects
Gives ridden horses incredible speed and endurance, allowing them to generate move more efficiently with less effort. Forces the rider to speak in Ancient Welsh dialects afterwards.