C1007 The Underground Battle and the Mine Battle

Dong Xuefeng pondered for a moment before responding, "It sounds good in theory, but I wouldn't advise going through with it."

"Oh?"

Su Yi's eyebrows lifted in curiosity. "What's your reasoning?"

Dong Xuefeng spoke with earnest, "Constructing a Rainbow Eight Stone Formation to envelop the entire Back Base would require an excessive amount of materials. The cost outweighs the benefits. Moreover