Black gas!
Upon hearing these two words, Marvin immediately came up with several guesses in his mind.
However...
Before making any inferences, he felt he needed to collect more information, so he squatted in front of the pile of dead rats and had Levin slice open the soft belly of one.
The sharp blade easily cut through the skin, but only a small amount of blood flowed out.
There was no black gas.
"Eh?"
Levin said in surprise, "I definitely saw a wisp of black gas just now! I'm not lying!"
"Cut a few more."
"Okay."
The blade pierced the skin of rat after rat, and at first, everything was normal, until the skin of the seventh rat was broken...
A wisp of black gas, so faint that it could not be any fainter, slowly rose up and vanished in an instant, unable to even maintain a shape.
"That's the damn thing!" Levin exclaimed.
"I've seen it before."
