The light in the sewer was very dim, but the surrounding walls were covered with light-gray moss. The moss emitted a faint halo. Although it wasn't enough to brighten the sewer as daylight did, the feeble light was sufficient for ordinary players to walk around. Thieves, the class of players that loved this environment the most, could even thrive here.
Song Jian directly opened his vertical eye in the middle of his brows and the surrounding environment immediately brightened up.
Since the vertical eye naturally offered dark vision, even in a pitch-dark environment, Song Jian could see clearly as if it were daytime. Hence, having clear vision here was certainly not a problem.
The conditions in the sewer were awful. Not only did a strong, stinky odour fill the air, but the ground was also littered with lots of garbage. As a direct consequence of this, the status bar of Song Jian displayed a "Movement speed reduced by 5%" debuff.