Formula
CommonFun.calcBuff_6990
function CommonFun.calcBuff_6990(srcUser, targetUser, a, b, c, d, lv)
if srcUser == nil or targetUser == nil then
return 0
end
local list = {
1,
2,
3,
4,
7,
8
}
local random = srcUser:GetRandom()
return list[random % #list + 1]
end