Something that affects the brain... that's easier to accept than people rising from the dead, anyway. There are plenty of toxic plants than can poison a person into acting irrationally. (Some people even do it for fun, she thinks.)

Aloy is briefly taken aback by the question, if only because she's so unused to people knowing what a Focus is. The Quen did, of course, but Kahl is very much not Quen.

"My... augment. It's called a Focus," she says, touching the device at her temple. "It doesn't draw maps. That would be useful, though. Can you transfer the data file?"