This quest has no legend.
Go into the Darashia Dragon Lair, north of Darashia through the level 40 Gate of Expertise. The entrance looks like this:
On the first floor you will find only Dragons and Dragon Hatchlings, go south to find the stairs for the second hunting level. Going this way you will maximal meet 2 Dragons.
On the second level there are Dragons as well as Dragon Lords, go north-west to find some more stairs which will take you to the third level. On this way you will face 1-3 Dragon Lords one by one.
The third hunting level has 4 Dragon Lords, you will find your reward inside the dead dragon's body.