(Thanks for the tips; two bonus chapters.)
"By order of the Emperor, effective immediately, the entire palace is on maximum alert. The Adeptus Custodes will assume full control."
Commander Constantin Valdor's voice was broadcast over both encrypted channels and external loudspeakers, cold, mechanical, and unquestionable.
Every syllable struck like an adamantium rivet, driven into the ancient, solemn foundations of the Imperial Palace.
At his command, the Custodes units already in position began to move silently and efficiently.
Clad in flawless golden armor, they looked like immortal guardians stepping out of myth. In groups of three or five, they swiftly seized and sealed every critical entrance, strategic corridor, communications node, power nexus, and weapons platform in the palace.
Their heavy footsteps fell in perfect unison, echoing through vast marble halls and deep corridors, replacing the usual scattered sounds of bureaucrats coming and going.
Golden figures stood before every vital doorway, their halberds lowered. The gazes behind their enclosed helmets swept over every unauthorized movement like tangible searchlight beams.
The Void Shield Generators were set to maximum output, countless barriers overlapping like layers of invisible domes.
In mere moments, the heart of power and faith of the Imperium of Man was completely sealed off and isolated behind an iron wall of absolute military might, cutting-edge technology, and extraordinary psychic energy.
Meanwhile, large numbers of mortal soldiers from the Solar Auxilia, clad in standard armor, rapidly assembled in their designated zones.
They silently formed ranks in battle formation, their lasguns and heavy weapons gleaming cold and hard beneath the palace's eternal artificial daylight.
Their orders were brief: stand by and ensure the outer areas remained completely clear.
The air carried the distinctive ozone smell of plasma weapons yet to fire, mingled with the low resonance of countless people breathing shallowly.
"What in the