Prelude of Black and White
Start this quest by checking the door marked "Prince Regent's Rm", which is on the south side of the small courtyard located at (H-8) in Chateau d'Oraguille. You will be asked to obtain the Yagudo Holy Water and a pair of Moccasins.
Make sure you are a White Mage when clicking the door, if you changed to another job to fight the NM of the previous quest Moccasins +1 are not accepted.
Go to Castle Oztroja and kill the Yagudo Abbots for the Yagudo Holy Water and Moccasins.
You may also craft or purchase the Moccasins from the Auction House.
Yagudo Abbots have extremely low drop rate for Moccasins (<1%).
Yagudo Abbots spawn behind the brass door at (G-8) on map 3.
The combination to these levers can be found behind the secret door at (I-10) on the same map.
Yagudo Abbots located at (G-9) & (G-10) on map 2 in Castle Zvahl Keep can also drop Yagudo Holy Water. Although fewer of them spawn in this zone, they are 1-7 levels lower than Yagudo Abbots in Castle Oztroja.
Trade both items to Narcheral (M-6) upstairs in the cathedral in Northern San d'Oria to complete the quest.