The scene shifts from speech to sound. Hearing Duryodhana's words, the grand old patriarch of the Kuru clan, Bhishma, lets out a roar like a lion and blows his conch with full force. This blast signals the beginning of war.
The text calls Bhishma "Pratapavan" (the valiant one). Despite his great age, his spirit was undiminished. The lion's roar followed by the conch was an ancient tradition: the commander announces that the army is ready. It was a declaration that could be heard across the entire field.
There is tenderness folded into this moment. The phrase "tasya sanjayanan harsham" means Bhishma did this to lift Duryodhana's spirits. A grandfather reassuring his grandson before the storm. Bhishma knew this war would end badly, yet duty and affection moved him to give Duryodhana this moment of courage.