Lis immediately held his breath, didn't turn around, and slowly moved his footsteps to retreat backward.
No matter what the creature in front was, it was something he couldn't afford to provoke at the moment.
Of all strategies, retreat was the best!
Lis, tactically retreating, tried to minimize his presence, and the additional "Breath Concealment" and "Invisibility Technique" were only three-circle spells, not of high tier.
Although undead monsters have poor perception, Lis decided it was still best to be cautious.
Lis made sure to maintain a safe distance from the creature ahead and, after retreating to a fork in the labyrinth, hurriedly turned into another directional passageway.
After reaching a place he deemed safe enough, Lis stopped and tried to observe the unknown creature from a distance to see if he could gather any useful information.
After waiting for quite a while, dull footsteps finally echoed from the distant passageway.
"Thud, thud..."