Legendary dragons have 2 versions. Fire/Frost.
Their names has been changed to Epic [Element] Dragon.
They have been granted a visible red/blue outlining tint depending on their element.
The dragons eyes has a normal map for them, thus, the eyes are now able to glow, however, not with a bright gleam, viewable from a distance.

Legendary Dragon's model edited to remove the four bumps in the eyes.
Legendary Dragon's texture edited to make the now smooth eye, solid purple.
Legendary Dragon's texture edited to darken the overall skin of the dragon.

Initial upload.