This "Mahayana" Immortal Technique, although Tan Shuchang derived it from comprehending Qing Mu Immortal's friend's "Mahayana Great Thousand," differed fundamentally because this "Mahayana" Immortal Technique did not focus on subduing and killing, and it certainly wouldn't be so overbearing as to prevent the souls of the defeated from reincarnating for eight thousand years.
Qing Mu Immortal's "Mahayana Great Thousand" Immortal Technique targeted the powerful undying nature of True Immortals without a doubt.
Meanwhile, Tan Shuchang's version of the "Mahayana" Immortal Technique focused on disruption.
Whenever this Immortal Technique was executed, any Immortal Technique aimed at him would be affected. Even if the opponent could forcefully execute their technique, its power would significantly reduce, posing no threat to Tan Shuchang.
He had intentionally comprehended this aspect.