C1414 There must be a Treasure

There must be a treasure.

"Xiao, what's wrong? Did you discover something?"

"Guu Feng, that blood river is a formation!"

Ling Xiao, who had high attainment in formations, could tell, "If I'm not wrong, it should be the Nine Heaven Ten Prison Blood River Great Array!"

"Nine Heaven Ten Prison Blood River Great Array!" Although he did not know how powerful this formation was