Gamma
Gamma is a Rank S Elite Mark found in Yanxia.
Gamma is a Rank S Elite Mark found in Yanxia.
Killing the Elite Mark will reward the player up to 
100 Centurio Seals, 
100 Allagan Tomestones of Poetics, 
30 Allagan Tomestones of Aesthetics and 1 
Cracked Cluster.
Coordinates
Yanxia
(x28,y11) (x27,y10) (x24,y12) (x21,y9) (x17,y14) (x12,y31) (x17,y34)
Spawn Conditions
Trigger
Summon the Toy Alexander minion obtained from the Lv60 Raid Alexander - The Soul of the Creator and walk/fly over spawn points during night-morning (5pm to 7am in game time). Assuming its random timer is up, Gamma will spawn on top of you at its chosen location.
Time
84 to 132 hours after it's been killed; or alternatively 50 to 80 hours after maintenance has ended.
Tips and Tricks
Gajasura, Angada and the two B Ranks share some spawns with him. Gamma has 7 Spawn Points, this can make it easier on checking and save effort on traveling.
Description
"Ah, this one. The information on a rogue imperial prototype warmachina did not come cheaply or easily.
Ahem. “Codename: Gamma. This model was designed to be an automated improvement over the piloted armored weapon, allowing it to operate without loss of function in near darkness. The results were unsatisfactory and the project was supposedly scrapped.
During testing, Gamma was commanded to attack a compact craft capable of considerable maneuverability. Now, whenever it detects said craft, the weapon engages in indiscriminate hostility.” Sounds positively cheery, doesn't it?"
~ Hersande of Kugane
"Prototype heavy magic weapon of runaway Imperial army, The development code "Gamma" was registered as Risky Mob. Originally, an armored weapon, which is a manned aircraft, It seems that it was a model improved to unattended specifications for the night war ... .... The result is as you guessed. Apparently, as an attack target during the trial startup, It seems that a compact and quick experiment machine was set up. When it detects a corresponding aircraft, it seems to attack indiscriminately."
~ A translation from Japanese