He was destined to be the legendary bird that sings only once in his life.
From the moment he left the nest, he never looked back, searching for the thorn tree he found in the smoke and flames of war. When he found it, he would stick his flaming body on the sharpest and hardest thorn and cry softly. The blood covered the thorns and eclipsed the enemy. When the song ended, he was exhausted and died.
It's just that no one knows what this way of sacrificing one's life is for, except him, the thorn rooted in the dirty soil. The destiny like flowing fire sings an unknown mystery.