Sheep in Antlion's Clothing

Experience
2500xp

Treasure

 * Hagun
 * Martial Axe
 * Martial Wand
 * Forager's Mantle
 * Harmonia's Torque
 * Galateia
 * Kejusu Satin
 * Viridian Urushi
 * Cloud Evoker

Although rare, it is possible that no treasure will spawn from the chest. It is also possible for multiple of the same treasures to drop. i.e. 2 Forager's Mantles can drop.

Gaining Access

 * To enter the battlefield, talk to Jakaka in Attohwa Chasm at (G-10), near the entrance.
 * Jakaka will give you the Flaxen Pouch.
 * Climb the mountain Parradamo Tor in Attohwa Chasm, centered around (J-9) in the east section.
 * Trade the pouch to the "Cradle of Rebirth" target at the summit to receive the Pouch of Parradamo Stones.
 * Return to Jakaka and trade her the Parradamo Stones to receive the Key Item Miasma Filter.
 * Proceed through Attohwa Chasm to Boneyard Gully. The Miasma Filter will allow you to enter.
 * You will be able to choose one of the four ENM battles in Boneyard Gully where the Key Item Miasma Filter is needed and you can only complete them every five Earth days.

ENM Battle

 * You will enter the battlefield facing a single Antlion-type mob named Tuchulcha. Despite the appearance of three other Antlion mobs, only Tuchulcha must be defeated to complete the battle. This battle is uncapped; the time limit for this battle is fifteen minutes. You may enter the battlefield with up to six party members.
 * Tuchulcha is immune to Gravity, Bind, Paralyze, and Charm.
 * At approximately every 1/4 of its life (75%, 50%, 25%), Tuchulcha will bury itself under the sand, accompanied by use of the ability "Sandpit". When this occurs, the party will have to explore the battlefield to discover where Tuchulcha is buried. At this point, three "Hunter" Antlions will spawn as well, "buried" in random locations throughout the battlefield; there will be a chance that the party will find them instead of the NM. When Sandpit is used, all hate is reset on Tuchulcha, so feel free to do as much damage as possible before Sandpit. Sandpit will also bind whoever had hate last on Tuchulcha.
 * All Antlions will be "found" via their use of Pit Ambush. This is a very damaging ability and wipes Utsusemi shadows. Preparation is recommended. Mages should maintain Stoneskin and perhaps some damage reduction gear, like an Earth Staff, to help prevent being one-shotted.
 * Most parties will split up to look for the antlions, but be wary of accidentially finding 2 or more at the same time, or someone going too far off on his own and finding themselves in trouble before his comrades are able to come to his aid. If you discover an antlion, make sure to communicate it to your party.
 * Defeating the "Hunters" will have no effect on the outcome of the battle, as only Tuchulcha must be defeated. Chances are quite high that you will uncover all 3 Hunters before Tuchulcha is defeated, however.
 * The "Hunters" appear to be succeptible to Sleep. Many parties Sleep the "Hunters" while looking for Tuchulcha.

Source