Cocytus Frost Aura Range

The enemy was roughly one hundred meters away. They despaired at the
distance separating them, but even so, they ran with all their might. That was
because even if they perished halfway, their deaths would still give the chiefs and
Zaryusu information they could use.

- Overlord; Vol 4; Chapter 3

------------------------------

The Lizardmen marched into the marsh, and formed up at the region between
the skeletal army and the village.

[...]

Cocytus slowly drew closer.
He strode proudly into the marsh, past the skeletal army—
—And then Cocytus stopped, roughly thirty meters away from the Lizardmen.
After that, his insectoid face swiveled atop his slender neck, as though looking
for someone.

[...]

“Hold on a second! Get out of here, young ones! This is a job for us old folks!”
The Lizardmen who shoved their way forward were all advanced in years, but
none of them was old enough to be considered elderly. There were fifty-seven of
them, and none of the others could say anything after seeing their faces.
Perhaps if they looked like they were resolved to die or had given up on
themselves, they would have asked to come along. However, their expressions
were a plea for the younger Lizardmen to live on and celebrate the miracle of
life.
With nothing left to say, the rest of the warriors turned back.

[...]

Thus, he unleashed his aura.
It was a skill derived from the Knight of Niflheim class — [Frost Aura]. This
special ability damaged and slowed the foe through the use of extreme cold
temperatures. At full power, it could even engulf the Lizardmen spectating from
the sides.

- Overlord; Vol 4; Chapter 5