Between the Steppes and the Mothyards is a small depression in the landscape. Head into the depression and towards the large corrugated metal doors. The ghost is hidden in the foliage in the left hand corner.
Pass through the dilapidated aeroplanes and towards the building with radar dish, this is the Lunar Complex of the Skywatch.
As you are passing through the Mothyards keep to the right hand side when proceeding to the Lunar Complex. Behind the final and right most aeroplane you will find a wing jutting out of the ground. Run up the wing and use double jump or glide to reach the cavern beyond. The Ghost can be found to the immediate left inside the cave.
The main entrance of the Lunar Complex is protected by two FallenVandals and a Fallen Captain. Dispatch the foes and head inside the Skywatch, through the corridor on the left.
Follow the corridors through the complex until you reach a darkness zone. Here a gate is blocking your progression through the building, locked by the Fallen to prevent the escape of what is kept inside.
When you reach the first room where you encounter the Hive, proceed immediately to the right and follow the wall. You will reach two terminals under a yellow sign reading "вход воспрещен" ("Off Limits" in Russian). The Ghost is hidden on top of the largest of the two terminals.
Numerous Thrall will try to overwhelm you. Retreat and kill the thrall from a distance as the Thrall lack ranged weapons and can can deliver heavy melee damage.
Further in there will be 5 Acolytes waiting. The Acolytes posses ranged weapons and therefore can attack from a distance. Dispatch these to clear the room.
Proceed through the doorway at the end of the room and up the stairs. Here the dark will subside and you will enter a large hangar. Again you will be ambushed by lots of Thrall and Acolytes.
Quickly dispatch the accompanying mobs to make the fight with Gotra easier.
Boss: Gotra, Eir Spawn
Gotra is an easy boss with moderate shielding susceptible to solar damage. Gotra
He is protected by multiple Fallen foes who will replenish. Gotra is able to deal medium damage from afar using darkness blast and can also cast an area of effect attack which impairs vision and causes repetitive damage through poison. Kill any accompanying Hive Thrall and Acolytes or stick to high ground in order to make dispatching Gotra easier.