Forge Your Destiny

First, talk to Jaucribaix. Then talk to his two students somewhere in Norg. (Aeka, I-8, Ranemaud, I-7) They will give you the oriental steel and a sacred sprig.

Trade the steel to a ??? at D-7 Konschtat Highlands, fight the NM bomb 'Forger'. Each party member who wants to complete this quest needs to trade their steel. There is a minimum 3 minute wait between each spawn.

Trade a hatchet to a ??? on a giant tree at the eastern side of the Sanctuary of Zi'tah (L-10). Fight a NM walking tree. After the fight, trade the other item from Norg (the sprig) to the ???. Collect a sacred sprig. Only one battle is necessary to get the whole party this part of the quest.

Both of the NM fights will be cake, but probably challenging to level 30 characters.

Return to Norg, give the two items to Jaucribaix, wait 3 in-game days (3 earth hours) to collect your reward.

Reward is the Advanced Job, Samurai, and a sword.
Prerequisite: Level 30 Job.
This quest also requires the Zilart Expansion.