Unrelated?
Mirage's eyes constricted when he saw the entire process of their transformation happening right in his eyes.
His countenance looked pale as he couldn't believe that a human body was reduced into such an abominable state within such a short amount of time.
Mirage's eyes became full of wariness as he looked at those black things.
'They should be those black things that were moving inside those people's bodies...'
He started to observe them further and in his eyes, he could see that these black abominations made out of dead people's remains looked like five huge slimes made out of black oil.
These black slimes continued to move and wriggled on their place like five big black worms.
This wasn't even the most terrifying trait of them. The most horrible thing these abominations have in common was that they all possess the images of the dead people from before.