Rumbling thunderous booms rang out, and blinding lightning flashed, engulfing the entire cave.
Wang Mengbin was undergoing his Thunder Tribulation, while Cheng Zhenyu and Zheng Nan were not having an easy time either.
Their faces were pale, and they were panting heavily. There were simply too many Demon Beasts attacking Qingyang Island. There were more than thirty Tier 4 Demon Beasts alone, and their numbers were still increasing.
Cheng Zhenyu changed his Hand Seal, and a resounding sword cry rang out. Countless sword lights swept forth, cleaving into some low-tier Demon Beasts. The low-tier Demon Beasts turned into piles of mangled flesh, their blood staining a large expanse of seawater red.
Zheng Nan's fingers swept rapidly across the pipa strings, and the pipa sound grew impassioned and high-pitched.
Wave after wave of Invisible Sound Waves swept out toward the Demon Beasts.
When the low-tier Demon Beasts touched the Invisible Sound Waves, they let out miserable cries, blood streaming continuously from their bodies. When the high-tier Demon Beasts touched the Invisible Sound Waves, they released one furious roar after another.
Rumble!
A deafening boom rang out. The Blue Light Screen twisted and warped violently, its spiritual light dimming.
"If this continues, it won't work. Madam, let's let some of the Demon Beasts in! We can divide and exterminate them, easing the pressure."
Cheng Zhenyu instructed her as he struck several Hand Seals into the Formation Plate.
Zheng Nan nodded and also struck several Hand Seals into the Formation Plate.
Ripples like water waves spread across the Blue Light Screen, creating dozens of gaps. Several Demon Beasts followed the gaps onto the island, all of them rushing toward where Wang Mengbin was.
Among them, one Azure Giant Eagle, with a wingspan of more than ten zhang, was the fastest. It did not