Disguise? Appearance alteration?
A better term would be Cell Replication.
With an actor's professionalism and the source of Evil Circle, William could easily obtain other people's cells and rapidly replicate them, transforming into their appearance from the very root of the flesh.
Not only that, he could also implant Cancer Cells into another person's body, inducing them to transform into his appearance.
Before leaving the theater, William had already switched identities with Lainey.
Through his investigation into the Fourth Calamity, his external contact with it, and what he had seen in the current Primal Video Tape, he had more or less deduced the nature of the Fourth Calamity. He knew very clearly that Lainey would make excellent bait.
Sure enough, it had taken the bait.
But it had only bitten down on the hook,
and if he wanted to drag the entire big fish out of the water and stuff it into a bucket, he still needed sufficient skill and execution. After all, this was a big fish bearing the mark of the Fourth Calamity.
Being caught peeping was a major taboo,
and the telescoping eye socket, resembling a camera lens, immediately carried the eyeball back into Between the Seams,
but during its retreat, a voice that was impossible to distinguish as male or female came from "Lainey's" mouth—a voice that made one's entire body feel uncomfortable just from hearing it.
Even the eyeball's retreat slowed.
An aura unique to William had already spread out when he spoke. It was as though countless strands of Black Hair were growing from his mouth and winding toward the place where someone had been peeping, while waves of whispers traveled straight into the Wall Seam.
"When I first came into contact with evil, I felt that it was like a beautiful rainbow.