Ocean's Breath Plateau Why can't I cross this river?

The worst of his wounds, his hip and his rear leg, would need immediate tending but it was the kind of medicine Reyes was not skilled with. He could patch himself up with the bare minimum if need be, but nothing major. Infection had started to settle there within his hip and he felt the burn of his skin throbbing.

The stranger appeared as if from the mist itself, congealed, staring. At first Reyes thought he was imagining them — or that they'd come to finish the job by order of the mangy pirates he'd narrowly escaped — so he was at once on-edge and bristling.

What kind'a help? But even as he asked, he smelled the bundle the stranger carried and tasted the obvious medicinal quality it exuded. And what'll it cost me?