Legendary Dragon

Legendary Dragons are one of the many breeds of dragons found in Tamriel. They are the most powerful dragon sub-type in.

They are introduced in and typically appear throughout Skyrim at level 78+.

Appearance
Unlike other breeds of dragon, Legendary dragons have distinctive thick, curved horns. They have a black and purple scale color. They are also unique in having what appear to be compound eyes, formed of multiple "eyes" in a single socket.

Combat
The legendary dragon behaves like any other dragon in combat. It attacks with Fire or Frost Breath, and may sometimes land either on its own accord or because of the Dragonrend shout. Along with the Revered Dragon, it uses the Drain Vitality Shout.

Notable items
Along with dragon bones, scales, gold, and gems, legendary dragons also have an additional chance to drop Daedric weapons and armor.

Trivia

 * The Legendary Dragon is stronger than Alduin in terms of shouts, health, and bite damage, although Alduin has a 50% resistance to all damage types.
 * Using the console to summon a Legendary Dragon and then killing it does not count towards its achievement, as activating a console command disables achievements.

Bugs

 * As with all other dragons, when defeated, it might not be possible to absorb its soul.
 * Fix: spend a dragon soul, and the dragon's soul should be absorbed.
 * On the first encounter with a legendary dragon it is somewhat common that its model and textures will be out of date and smooth, this is the same with most dragons, but even more with legendary due to their rather rare nature. In some cases the legendary dragons will remain untextured, never fully rendering.
 * This is very common with the Xbox version of the game once the add-on is loaded.
 * Sometimes Legendary dragons may appear almost ethereal but without the typical blue glow.