Mental Plague!

The eyes of those people all turned into black swirls.

Their whole lives, will, and souls were absorbed by this swirl into some sort of… frantic zombies.

Even their brain cells had qualitative changes. The old brain cells perished nonstop, and the new brain cells established weird sulcus and gelatins in a completely different way, imprinting the indestructible ideas on their souls.

Those people who dwell in the dark will, unable to free themselves from it, were completely melted in the network of soul resonation. They unleashed their mental power and released brainwaves that contained black venom to affect more and more people.

It was like the spread of a virus.