The Hands that Move the World
The fiery daemonic horse of War.
Ruin is the Horse of War, one of four fully-subservient daemons which have existed for untold centuries, but have only relatively recently assumed the forms of horses. Ruin serves the current Horseman of War faithfully, and has done so for Szuriel, Derli d’Kundarak, and Zelishkar of the Bitter Flame alike. The only exception was Mordakhesh the Shadowsword, who very briefly held the title after his defeat of Zelishkar. Their opposed nature prevented Mordakhesh from properly summoning Ruin.
Like the other Horses of the Apocalypse, Ruin is impossibly fast, is capable of flight, and can be summoned at a moment’s notice by its master.