Undead dragons are the remains of fallen dragons that have risen and/or been withered through necromancy or other means and originated from the different dragonflights. They can appear usually as reanimated bones. Some are controlled by the Scourge under the Lich King, while others are raised or controlled by other powerful individuals.
- Emberwyrms, raised by necromancy from red wyrms of the red dragonflight.
- Fel dragons, raised by fel magic, presumably from dragons of any dragonflight.
- Frost wyrms, raised by necromancy from wyrms of various dragonflight.
- Magmawyrms, raised by necromancy from black wyrms of the black dragonflight.
Notable undead dragons
|Chillmaw||Frost wyrm who the Cult of the Damned plans to use to attack the Argent Tournament Grounds.||Frost Wyrm||Unknown||Undead-Killable|
|Felmyst||Formerly known as Madrigosa. Dragon sent to Quel'Danas alongside Kalecgos. Flys over the Dead Scar, taunting Brutallus, whom eventually kills her.||Fel Dragon||Blue||Undead-Killable|
|Ghostwing||Frost wyrm found at the Fleshwerks in Icecrown.||Frost Wyrm||Unknown||Undead-Killable|
|Glacion||Frost wyrm stationed at Gjalerbron who is to be used on attacks against Westguard Keep and Camp Winterhoof.||Frost Wyrm||Unknown||Undead-Killable|
|Hailscorn||Frost wyrm found at The Avalanche in Sholazar Basin.||Frost Wyrm||Unknown||Undead-Killable|
|Icestorm||Frost wyrm found the the Dragonblight who is the keeper of Thel'zan the Duskbringer's Phylactery.||Frost Wyrm||Unknown||Undead-Killable|
|Nightbane||Formerly known as Arcanagos. Agent who confronted the guardian Medivh at Karazhan, and was burned from within, remains littering the area.||???||Blue||Undead-Killable|
|Persistence||Frost wyrm who serves as mount to the death knight Stefan Vadu.||Frost Wyrm||Unknown||Undead|
|Rimefang||Frost wyrm who serves as mount to Scourgelord Tyrannus in the Pit of Saron. Later found in the Frostwing Halls.||Frost Wyrm||Unknown||Undead-Killable|
|Sapphiron||Ancient servant of Malygos. Lair invaded by Arthas who slew and raised him as a Frost wyrm. Serves Kel'thuzad, guarding his inner sanctum in Naxxramas.||Frost Wyrm||Blue||Undead-Killable|
|Sarathstra||Frost wyrm known as the "Scourge of the North". Hunted down by the Horde scout Rokhan in the Dragonblight.||Frost Wyrm||Unknown||Undead-Killable|
|Sindragosa||The Frost Queen, first of the Frostbrood. Former prime consort of Malygos. Perished in the War of the Ancients, and remains were once found in Icecrown.||Frost Wyrm||Blue||Undead-Killable|
|Spinestalker||Frost wyrm found in the Frostwing Halls||Frost Wyrm||Unknown||Undead-Killable|
|Teribus||Cursed skeletal dragon flying high over the Bone Wastes in Terokkar Forest.||???||Unknown||Undead-Killable|