He froze.
Not just because of what he saw.
But also what he saw exerted so much pressure on his mind that it took actual physical effort to push his body forward.
Not because there was a forcefield pushing back against him, no. But because his subconscious instinct to run away from the grave sense of danger was extremely high. He knew that he had to get away from there as soon as possible.
Yet what he saw was shocking.
He was unable to turn away.
What pushed him away from it with fear also pulled him towards it with shock.
It was as though these two emotions pulling and pushing at his mind were crushing his mind. It was painful on a psychological level.
('What… is that?') Rui wondered with horror as he stared at the center of the mining floor.
It was a giant messy blob of wood and bark.
Its upper half was connected to a multitude of roots coming from up above.