```
It must have been something as sharp as a blade, for Lyle and Karen heard the shrill whistling of a swift blade cutting through the air, which was particularly piercing in the quiet shadows. Just as the two anxiously guarded against the unseen attack, a strange tree nearby made a sound. In an instant, a one-meter-wide gash appeared on its trunk. The speed was so swift that even after the scar was made, the tree didn't show a hint of swaying.
"It" is invisible, carrying a blade sharp enough to decapitate us, like an experienced executioner. An intangible pressure descended upon the two, and Karen and Lyle, back to back, scanned the surrounding shadows, trying to find some clue.
Lyle reached into his sleeve and touched his tentacles with Nia's, communicating obscurely through Nia's telepathy.
Where is he?