The golems, who finished their repairs, used a dedicated pathway by themselves arranged to head towards the level where the intruders were.
“It is the height of over-technology. It is also a great discovery after a long time.” (Burkhart)
And then we have confirmed the existence of an enormous magic gem, supplying the mana for the sake of moving all of these devices.
Its size exceeded the size of the magic core of the ancient bone dragon, I defeated before, by leaps.
Despite using that much flashy magic power, the enormous magic gem even now continued to glow in a red light.
Maybe it compensated the mana by extremely firing itself up.