Gamma
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 and walk/fly over spawn points during night-morning (5PM to 8AM Eorzea Time[1][2]). Assuming its random timer is up, Gamma will spawn on top of you at its chosen location.
- Toy Alexander minion obtainable from the Lv60 Raid Alexander - The Soul of the Creator.
- Factors such as vertical distance[3] and whether the player is mounted, flying, or moving have no effect on spawn.
Time
84 to 132 hours[4][5] after it's been killed; or alternatively 50 to 80 hours[6][7] after maintenance has ended.[8]
Tips and Tricks
- Diffractive Laser is a dodgable circle AoE.
- Magitek Flamehook applies a Pyretic debuff to all players in range, dealing fire-aspected damage with each action the player performs.
- Magitek Cannon is an attack on the main tank.
Launcher is an attack on random players with damage ranging from 10-50% of their health.- Limit Cut is an attack on the main tank.
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.— Japanese Client Translation
Gallery
References
- Gamma spawning dead on 5PM has been reproduced many times, including here and here.
- Personally witnessed Gamma spawn 4 times between 7AM and 8AM ET including timestamps 7:01, 7:20 and 7:34.
- Personally spawned Gamma from x12,y30.2,z1.0. Take note of the Z axis which is extremely high up.
- Personally witnessed Gamma spawn 83:48 hours after its last death.
- Personally witnessed Kaiser Behemoth go to 130:20 and 130:50, and Salt and Light somewhere inbetween twice.
- Personally spawned Salt and Light 50 hours after server went up several times.
- Personally witnessed Bird of Paradise and Kaiser Behemoth spawn at about 79:24 after maintenance and this is the latest I've ever seen.
- https://horus-hunts.net/SpawnLogs/Graphs