[Thor agrees, which is why he keeps Mjolnir in hand. And he still feels badly for frightening her, regardless. He points with the hammer towards the edge of the dead zone.]

The blight is there. You can tell it by the dying trees and the still air. It has grown again since this morning, though not by much.

[You know how he can tell? Because he left a marker. He walks into the dead zone to collect it, just a step or two: it's a piece of rebar from the ship, something at least relatively durable, and it's already started to rust.]