The Ulaid hero Cúchulainn kills him with a spear from distance, then decapitates him before his body hits the ground. After the Ulaid win the battle, Cairbre's son Erc swears allegiance to Conchobar, marries Cúchulainn's daughter Finnscoth, and becomes king of Tara in his father's place. Erc is later part of the conspiracy to kill Cúchulainn. After avenging Cúchulainn, Conall Cernach brings Erc's head back to Tara, where Achall dies of grief for her brother.