This facility has not released its secrets without a fight, and you are no longer willing to go on without any information. Lucky you have multiple examples of the enemy to analyze. You have the remaining techpriets haul one of the less damaged turrets back up to base camp for a cursory analysis.
In the meantime, you send a message to fabricator Almiz for more support. The answer you received was quite unexpected. The fabricator not wanting to be miserly despite his limited resources offers to send you a full regiment of militia, twenty more techpriets and Magos Dominous Kermalov.
You thank the fabricator for his generosity, but you tell him such a force would be unwieldy in the confined spaces of the bunker. So you choose instead the magos and the twenty techpriests to come reinforce you.
While you wait for your reinforcements arrival you begin the analysis of the archaeotech in a field workshop. The turret is a beauty of technology clearly showing the abilities of the ancients.
A hermetic armored skin keeps all the electronics protected from any environmental hazard. You can also tell that the rotation mechanism for the turret is far more advanced than those used by imperial designs allowing for faster response times.
Eventually after a long and methodical analysis you discover that the targeting system is the best area to aim for. The targeting module is a bulbous protrusion on the left side of the turret. While it is armored its skin is thin enough and its sensors sensitive enough that two precise melta shots could penetrate and disable it.
It takes a day for the transport to bring Kermalov and the techpriest reinforcements. When the craft begins its landing in a clearing at the center of the camp kermalov jumps out of before its wheels have even touched the ground. You can see he is equipped with som form of shoulder mounted lascanon and has to bolter gauntlets as his primary weapons.
Kermalov approaches you and greats you with the standard binaric greeting of the mechanicaus but with a strong accent that even a binaric translator cannot compensate for (hes basically a Russian).
After formalities are over, he begins to speak. Explorator Umala I am happy to be of service. Despite the entertainment the wildlife of this world provides one always must seek out a new challenge.
You nod your head and reply well I must certainly believe that we have a new challenge before us as the secrets of the ancients are never unguarded. Now let us finish this exploration.
The both of you and your twenty-five strong force of techpriests head back down into the bunker and approach the blast door. However, this blast door is different as it is made of ceramite rather than adamantium like the others.
Like the other door this door is unpowered, so you follow the same procedure and order two techpriest to force it open like the other. Inside is another descending hallway and it like the door is made of ceramite.
The other end cannot be seen from this end of the corridor, but scans show the hallway ends at another ceramite door. After some travel time you reach the other ceramite door. After a cursory analysis the purpose for the use of so much ceramtie is revealed.
The blast door is showing an elevated temperature to the rest of the environment however it is not beyond tolerable parameters. You repeat your previous order to forcefully open the blasts but this time you level your weapons towards the opening in preparation for an ambush.
As the doors are pulled apart a gust of hot air hits you and your party. Inside you can see the source of the heat. A giant crystal glowing a faint blue that is seven floors tall is resting in a suspended cradle. The cradle is attached to the walls of a spherical room by cables as thick as a man is tall. Around the cradle is a hanging catwalk as wide as a chimera with an attached pathway of the same size leading down towards your door. Bellow the crystal and the walkway is a large green poll of what can tell is coolant.
However, the room is not undefended surrounding the crystal are four turrets of a similar design to those in the control room but of a much larger variant. Also, there are many turret emplacements of the original variant protruding from the ceiling of the spherical room. Lucky all of the turrets are dormant, but you doubt that will last.
At this moment magos Kermalov decides to break the silence griping your party. Magos explorator I believe I can neutralize the larger turrets with my lascanon buy I will need covering fire once I begin my work.
You like his plan as you don't need to preserve any more turrets for study, so you decide to approve it. Kermalov you respond we will do as you say.
Now you turn towards the rest of the party and speak to them. We will provide cover for the dominus pick a turret and when kermalov fires his first shoot all of you fire at their targeting sensors.
When you fish speaking Isas Kermalov takes a knee and the lascanon on his back activates and begins to rotate on a mount that is attached to kermalovs back taking aim at the closet's turret. After a short moment you see the canon flash and then the targeting module of the first turret explodes. With the explosion of one of its brethren the other turrets activate taking aim at the intruders and begin unleashing volleys of accurate lasfire.
The first volley proves ineffective against your techpriets are currently entrenched behind the railing the entry platform and at the first opening you see them return fire. You yourself had chosen a turret emplacement at the for side of the room. When you unleash your first shoot you see it miss by a meter, so you adjust your aim and fire again this time hitting true. However, one shot from your meltagun is not enough so you unleash two more causing the turret to release a shower of sparks that falls down into the poll of coolant.
You pick another turret and repeat the same procedure with success. You do this two times more and then you see the techpriest next to you have his right arm amputated by a returning shoot. By this time Isas has destroyed two more of the mega turrets and is relocating to fire at the last.
When he finds a workable angle Isas again takes a knee and begins charging his canon to fire. But as he does this you see one of the smaller turrets turn towards him. You level your gun in its direction and begin firing frantically attempting to beat it to the punch.
It takes you four shots but finally the turret ceases it function but not before firing one last time. Lucky your first hits damaged it enough that it misses hitting a few meters behind Kermalov. Without even noticing that he was in danger Isas Kermalov fires his shoulder canon killing the last mega turret. A moment there after the room falls silent as the last smaller turret is destroyed by the same female techpriet that saved your life earlier.
It takes two days to repair the control room but after that you discover the purpose of the seven-floor tall crystal. The crystal is an energy capacitor crystal capable of storing five times the output of a small plasma reactor. It is meant to be charged at times of low power usage and the energy released when there are spikes in the need for electricity causing you to wonder what sort of facility that used be above the crystal bunker would need such quantities of power.
Apparently before the facility above was destroyed the crystal was undergoing a charging cycle and thus had enough energy to sustain the bunkers functions for millennia. The facilities data also revealed that the turrets where designed for accuracy so as to prevent a shot breaking the crystal and causing a massive explosion. And the quantity of security was there in order to prevent an intruder from causing the same explosion.
After you were finished analyzing the facility you felt curious about the techpriest that had saved your life, so you approached her. Her name is Mashka Silas and is only 30 years old. During your introduction you see promise in her so you ask fabricator Almiz for permission to take her under your wing for further education.
Results
New hero unit Mashka Silas
Mega Energy buffer crystal: +125,000 energy
Loses: -7 techpriests