A massive horde of monsters surged against the walls like a tide. If not for the fact that the opening from the demon's lair was too small, the monsters pouring out from it would have long breached the "dike."
When the automatic weapons' firepower became insufficient, and the monsters breached the hundred-meter fire line, missiles rained down from the sky, utterly obliterating large swathes of them.
Only a few scattered monsters managed to break through the fire line and approached the walls.
A few larger monsters, braving the attacks, neared the walls. Realizing that dispelling bullets were ineffective against these monsters, Lu Yu knew it was time for him to act.
The Celestial Falling Bright Flame gathered in his palm, and a golden beam shot out, striking the monster but not piercing through its body, instead setting it ablaze.
Golden flames roared on the battlefield, and several monsters perished screaming within the fire.
