Water horse
(Book)

For the last twenty years, Esclin Aubrinos, arros of the Hundred Hills, has acted jointly with Alcis Mirielos, the kyra of the Westwood, and the rivermaster of Riverholme to defend their land of Allanoth against the Riders who invade from Manan across the Narrow Sea. He has long been a master of the shifting politics of his own people and his independently-minded allies, but this year the omens turn against him. The Riders have elected a new lord paramount, hallowed servant of the Blazing One, a man chosen and fated for victory. The omens agree that Nen Elin, Esclin's stronghold and the heart of Allanoth, will fall when a priest of the Blazing One enters its gates. Esclin needs a spirit-bonded royal sword, a talismanic weapon made of star-fallen iron, to unite the hillfolk behind him. But the same vision that called for the sword proclaimed that Esclin will then betray it, and every step he takes to twist free of the prophecies brings him closer to that doom. -- Publisher's description.