स तु कृत्वा विरूपाणि वदनान्यशुभानि च
sa tu kṛtvā virūpāṇi vadanāny aśubhāni ca
स तु कृत्वा विरूपाणि वदनान्यशुभानि च ।
संजय उवाच
The line underscores how, in war, terror and ill-omened displays are used to unsettle opponents; ethically it hints at the degradation of human (or heroic) conduct when fear and violence dominate.
Sañjaya describes a figure who takes on grotesque, inauspicious faces—an ominous transformation or display that heightens dread and signals a dark turn in the battle scene.