Second only to Cú Chulainn among Ulster heroes, Conall fulfills his oath by killing Lugaid who slew his friend, carrying the heads of his enemies at his belt. His epithet "Cernach" may refer to his victorious nature or to his angular features. He represents the ideal of warrior loyalty and the sacred duty of vengeance in Irish society. In poetry, Conall symbolizes unwavering friendship, the honor code that binds warriors beyond death, and the terrible beauty of vengeance fulfilled. He embodies themes of brotherhood-in-arms, the price of loyalty, and the warrior who lives to avenge rather than for personal glory.

Conall Cernach, foster-brother of Cú Chulainn, is famed for his invincibility (wearing a stone embedded in his neck that prevents beheading) and his vow to avenge Cú Chulainn’s death; his epithet “Cernach” may mean “victorious” or refer to a horned helmet; he embodies Ulster’s martial ethos and unwavering loyalty; poets can use Conall to explore brotherhood, vengeance, or the warrior’s code; his survival into later cycles contrasts with Cú Chulainn’s early death, offering narrative balance; his exploits appear in “The Death of Cú Chulainn” and “Bricriu’s Feast.”