From the start, the war strategy of the Mi Clan was not aimed at destroying the Tang Clan's elite martial force. No one knew better than them how difficult it was to kill a Martial Ancestor with Xuanji Jade.
However, the young ones who had shed their mortal coils were different. Even with spiritual armor, a well-prepared collective strike could injure them, let alone the arrow rain from the divine birds and the sudden attack from the Fierce Realm.
While the powerhouse of the Tang Clan was resisting the allied forces, the real killing weapon had already sneaked behind them. Eliminating thirty percent of the middle generation of the Tang Clan would leave them gasping for air for decades.
No matter how incredible the Tang Clan's cultivation foundations were, it depended on the clan's lineage and martial artists to turn them into actual strength. The true foundation of a mighty clan was these constantly growing young people.