Pulsing a wave of mana outward, Astaroth focused on every particle of mana in a five-hundred-meter radius, extending his focus as far out as he could, without losing his attention to detail.
From that point, he could sense everything. Whether it be the mana in the air, flowing to the wind, or the earth mana particles, rising with the dust of combat, he felt it all.
Falling into a hyper-focused trance, all the sound stopped reaching his brain, as his mind cut out any stimuli that didn't come from mana. With this, his brain started analyzing every particle it could sense, finding their differences.
In a matter of seconds, he was able to lock onto the essence of the corruption. He already knew it stemmed from demonic mana, leaking into their plane, but there was something else to it.
