Dawnlord Cave is the secret cave underneath Petalgrove city, Blackwood. It is used to turn titanium into obsidian. First, MugoCorp sends Dawnlord titanium. Secondly, they turn it in to obsidian. Lastly, they ship it to a Mugo Outlet in Woodlust called "Obsidian CO.".
Elven slaves are needed to ship the obsidian.