Death

 is a mythical horse found in the Undead Nightmare DLC pack for Red Dead Redemption.

Characteristics
Death is one of the Four Horses of the Apocalypse, along with War, Famine, and Pestilence.

Death carries a violent wake with him, rattling the skulls of the undead, capable of instantly killing any that it collides with, causing their heads to explode. There is a ghostly trail of wind following Death. Death is almost invincible and cannot be killed from conventional damage, other than a fall of great height, shot to the head, or drowning.

Locations
Before finishing the Undead Nightmare storyline, Death can be found in the wild. Death's location is entirely random, but is similarly located to the general areas that the other three Horses of the Apocalypse can be found. When near, a notice will come up saying "a mythical creature has appeared in the area". Death will only randomly appear after taming the other three Horses of the Apocalypse prior.
 * On some occasions Death can be found around Coot's Chapel.
 * A few times Death has been found south of Broken Tree and Beecher's Hope.
 * Death has also been found just north-west of Hendidura Grande (under Las Hermanas) in Nuevo Paraiso.
 * On occasion, Death has been seen near MacFarlane's Ranch in the Hennigan's Stead area.
 * It has also been found just north of Las Hermanas (near a small cliff up north).
 * South of Thieves' Landing and north of The Old Bacchus Place.
 * Around Mercer Station.
 * East-by-southeast of Ojo del Diablo.
 * West of Mesa de la Luna.
 * Has also been found just south of Gaptooth Breach.
 * East of or near Crooked Toes.
 * Outside of Cochinay.
 * Directly east of Armadillo.
 * Between Ridgewood Farm and Hamlin's Passing.
 * West of Fort Mercer, South-East of Repentance Rock.
 * In the area around Torquemada.
 * At the Mexican side of Butter Bridge.
 * Near Sepulcro.
 * Found around El Presidio.
 * East of Barranca.
 * Between Two Crows and Armadillo.

Trivia

 * Death's appearance in-game is different than the biblical version; Death in-game has striking bright blue eyes, a dark brown colored front and a lighter off white hindquarters and mane, while the biblical Death was a completely grayish to yellowish-green; sickly colors similar to that of a corpse.
 * Death's appearance looks like a cross between the Hungarian Half-bred and the War Horse with some minor variations.
 * Death is not fully invincible, as many users have seen it die by falling a great height (after a battle with the undead) and being shot in the head.
 * Death's ability to explode heads does not apply to harmless animals.
 * As Death is nearly immune to almost all forms of bodily harm, this horse is a prime choice for the Undead Hunter challenges, especially when the player must use the Torch. Simply stand completely still and allow the undead animal to run up to the horse, then attack it while it uselessly claws at the steed.
 * You must get Death and kill the Chupacabra (Undead Hunter Challenge - Rank 5) which will allow you to find the Unicorn, so you can complete the Undead Hunter challenge.
 * For rank 5 of the 4 Horses of The Apocalypse challenge, charge into Jorge's Gap while riding Death; However, it has been noted that this may sometimes cause the game to become unstable while killing so many undead so fast. To kill the Retcher, travel to El Presidio until you find one, unless one appeared in Jorge's Gap.
 * Upon receiving or breaking Death, you will receive his Blood Pact, which acts like a horse deed.
 * There is a glitch that when you feed it horse pills after about three minutes it will begin to lose stamina like a normal horse.
 * Killing undead with Death will count towards pistol kills, as you can get the achievement In a Hail of Bullets with Death.
 * It is recomended NOT to use Death for Undead Hunter Rank 4 as if you move into the animals, they will die and won't count as a Torch kill.