The commissioner on this one is Viera Wayfarer. She sits in the window of Whitecap in Balfonheim. She says that a giant monster has stolen whole her equipment and that she won't be able to defeat him by herself and that's why she has posted the announcement.
Vyraal can be found in the north-eastern part of Cerobi Steppe.
During this quest the petitioner will join you, but unfortunately she's not much of use for you. So count on your own.
About 97 000 HP
Resistant to Libra,
Vulnerable to Wind
Vyraal is huge so it won't be easy to miss it. During this fight the petitioner will join you, but unfortunately not very efficient.
At the beginning it's good to attack mainly with Aeroga, but with time, as his HP level decreases, he'll cast Magick Barrier on himself, which will make him immune to all kings of magick. You'll have to attack him with your weapons.
His attacks except for Magick Barrier are Fireball which deals damage to everyone in front of him, Sonic Fangs - a very string attack aimed against one of your party members and Immobilizega, which causes immobilize on everyone in range. Additionally the normal attack may cause confuse.
After the fight you'll recover Vierra's Rucksack. Viera won't reward you here. To collect the prize you'll have to go and talk with her back in Whitecap.
Bounty: 3500 gil, Halberd, Crystal Shield and Vyraal's Dragon Scale.