Biochemical Research Institute.
Level 5.5, located between the fifth and sixth underground levels of Impel Down.
After several years of expansion and construction, the number of rooms here had increased far beyond what it had been during the days of Okama Paradise.
For example, every senior researcher and above had their own private suite and laboratory.
As a newly promoted doctor, Muzan Kibutsuji—
—was currently in his private training room.
The equipment here was comprehensive. Besides all kinds of fitness equipment, it even had an adjustable gravity generation system.
Its area was comparable to a basketball court—not particularly large, but not small either.
Yet on this underground Level 5.5, it was already exceedingly rare.
[Crackle, crackle, crackle----]
At that moment, electric light flickered throughout the training room, while constant crackling filled the air.
The source was none other than Muzan Kibutsuji, sitting cross-legged in the center, completely naked.
Countless silver lightning serpents coiled and burst across his skin, spreading outward along the floor in every direction.
As the light grew brighter, the air temperature and ozone concentration also rose.
If an ordinary person entered—
—they would first feel a wave of heat rushing at them. Pale blue thick fog would fill their vision, making it impossible to see anything, while the pungent stench flooded their mouth, nose, and ears.
Their respiratory tract would then suffer intense irritation, leaving them gasping and coughing. Their central nervous system could even be damaged, causing dizziness, headaches, and dry heaving.
But the most dangerous things were the bolts of lightning leaping wildly through the dense fog.
The bioelectric current Muzan Kibutsuji was releasing had already exceeded ten million volts.
Given the human body's feeble electrical resistance, it would generate a current of hundreds of thousands of milliamps.
A single hit meant instant death!
This