Cid: Oh, shut up and help me remodel the Nam-Yensa Sandsea page!
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“The desert in the west of the Jagd Yensa. Fine sand beats in waves against the feet of the rolling dunes of this region which, together with the Ogir-Yensa Sandsea, is called the Great Yensan Sandsea. To the west of the Nam-Yensa lies the gorge known as the Valley of the Dead, so called because it has been the scene of many an ill-starred adventurer's demise.”
Unlike in most areas, plenty of different equipment can be found in randomly spawning treasures in the Nam-Yensa region. Recovery items, such as Potions, Hi-Potions and Ethers are also common. With the Diamond Armlet equipped the common item treasure is Knot of Rust, and the rare item is Elixir or Holy Mote.
In the Augur Hill region the treasure that spawns nearest to the exit to Ogir-Yensa may contain the Iron Helm and the treasure a bit to the west and north from that can be the dagger Chopper. The treasure on the little "island" in the middle of the area can be the Leather Gorget.
In the Urutan Yensa Sea area, the Chopper can again be found in a treasure and the treasure in the section furthest to the east of the map may have the Lambent Hat. The westernmost treasure in the Yellow Sands area can have the Killer Bow. The dead-end bit at the Demesne of the Sand Queen may have the Iron Armor. In Simoon Bluff, there is an oil rig to the west of the entrance to the area.
At the very end there are two treasures that can spawn, and can have the Cypress Pole and Amber Armlet in them. Wizard's Staff may be found in the treasure on the ground next to the oil rig, and the treasure in the westernmost section can be the Windbreaker. The treasure in the northeastern section is always the gambit for Foe: flying, unless it is gil.
The Withering Shores is an area which can only be accessed from the Zertinan Caverns. The treasure that spawns randomly nearest to the entrance to the cave, is either Argyle Armlet or the Ancient Sword if the treasure is items rather than gil. The treasure on the stairs leading up is 90% gil, but if it is items, it can be an Elixir. The treasure at the very top can be Rose Corsage or Vega.
While trekking across the Sandsea towards the Tomb of Raithwall, Vaan and the party encounter a Sandsea Moogle who claims a Urutan-Yensa had asked for help in defeating their blood-enemy, the Urutan Eater, and in exchange is ready to reward them with a treasure. The party searches through the Nam-Yensa Sandsea where they find a group of Urutan-Yensa fighting the Titantoise, and proceeds to defeat it.
When they return to the Sandsea Moogle, he says the Urutan wants to give a reward, but they need to find him. The party searches for the Urutan, and stumble upon a rare gathering of Urutan-Yensa. There, they find the one asking for help being tried for shaming the community by asking help from outsiders. The Queen of the Urutan "condemns him to dust", and the Urutan burns and vanishes.
The Sandsea Moogle tries to plead his case, but the Queen warns the moogle she might have punished him too, though merciful that she is, the Queen spares his life. Once the Urutans leave, the moogle notices a rare flower blossoming. He believes this is the treasure the rogue Urutan-Yensa had wanted to show them; a flower that is detested by the Garuda for its smell. The party picks some Eksir Berries from the "Rogue Urutan Flower", and continue their journey.