They were all D-Rank, so Aengus finished them quickly without revealing too much of his abilities.
Now, he could easily feel someone was watching him using his sixth sense.
The Supreme Hunter skill proved very useful in times like this.
Swish, swish...
He dispatched the creatures with ease.
He needed to end this quickly to force that person out of their shell.
Aengus understood that the person was clearly trying to gather some sort of energy from the humans, so he needed to steal whatever energy he could from the creatures to draw him out of his cocoon.
He also remained cautious not to alert his observer too quickly.
Using Darkness Shroud, Aengus concealed his actions as he absorbed the soul bodies with Soul Devour, before they could be recycled by the one watching him.
In this way, he quietly stole their energies, and it was working well.