CommonFun.calcBuff_7820
function CommonFun.calcBuff_7820(srcUser, targetUser, a, b, c, d, lv)
  if srcUser == nil or targetUser == nil then
    return 0
  end
  local skilllv_1 = srcUser:GetLernedSkillLevel(2539)
  local MDamSpike = srcUser:GetProperty("MDamSpike_MPEN")
  local A = MDamSpike * skilllv_1 * 0.02
  return A
end