Although they weren't numerous, their efficiency in clearing was quite high, and such a remote method was the best way to deal with the Undead Tide. As long as they weren't surrounded by the zombies, there probably wouldn't be any danger.
Because the movement caused by using the bow and arrow to shoot was very small, it didn't alarm the surrounding zombies. Su Changxing only shifted his view when he sensed a zombie dying in the Undead Tide.
Just when Su Changxing thought these people were only here to simply clear the zombies, one of the black-robed figures pulled a small gray ball from his pocket and threw it into a denser cluster of zombies, causing several fine lasers to expand from the ball's center.
BOOM~
A violent explosion erupted among the zombie horde, creating a huge commotion and nearly triggering the Undead Tide.
Without Su Changxing actively controlling them, the zombie horde in that area moved uncontrollably towards the direction of the explosion.
