At night, Sam and his friends gathered in the tower.
"Take adequate rest and don't come out unless necessary."
Leaving those words, Sam went on the Harbinger, back into the woods.
He is going to continue scouting. There are two reasons, one of them is moving in a group at night is dangerous and he is not confident to rescue all of them in case something unexpected happens.
The second reason is Sam has something he could rely on at the night and that is night vision.
That's right, he mastered night vision.
Generally, when the light rays which are reflected from an object hit the retina of the eye, the photoreceptors turn that light into an image in the form of electrical signals and transmit to the brain.
And the retina can only perceive the light rays that are within the visible spectrum.
