C669 Big Hollow Hand Seal

"Aooo!"

"Aooo!"

"..."

Eight deep roars continued to ring out, and with a loud rumbling sound, the space began to tremble.

What was that sound?

How could the void tremble?

No one knew what was going on. All they knew was that not long ago, they had heard a similar howl. Following that, the fifth region was reduced to rubble