Overlord

A narrow slit slowly opened amidst a shrub, and the invisible thief within observed the hill. He had chosen a good angle and could see the majority of the camp. The people inside walked around, and everything seemed ordinary. No one had discovered him yet.

Approach further? The thief thought about it, then promptly rejected the idea. His mission was to confirm whether the targets were actually here, not to spy on their camp layout. His mission was already complete. 

Just as he was about to retreat, he felt a cold wind shooting toward his neck. His body instantly tensed and shifted to the side, narrowly avoiding the fatal hit. 

Knowing that he had been discovered, the thief didn't stay for a moment longer. He abruptly turned around with a tap of his feet against the branches, then force-activated his stealth mode.