The petitioner on this hunt is Milha. You can find her in Lowtown kneeling near a closed home.
About 4 500 HP
Resistant to Libra,
Vulnerable to Holy
You'll find him just nearby the entrance to Garamsythe Waterway form Lowtown. You got to run exactly on the middle of the chamber to make it appear.
His attacks are Dark and Doom. Dark deals damage to everyone in range and doom starts countdown to your death. At the beginning he uses various attacks but just before the end he uses virtually only doom. It's a good idea to perform a quickening combo if you can afford the MP. Now all you have to do is to collect your bounty.
Bounty: 500 gil, Ether, Gaunlets.