He features in the Middle Irish saga Togail Bruidne Dá Derga (the Destruction of Dá Derga's Hostel).[1] He has no children, and it is prophesied that a woman of unknown race will bear him a son. He finds and forcibly marries the beautiful Mess Búachalla, daughter of Étaín and the former High King Eochu Feidlech (or, in Tochmarc Étaíne, his brother Eochu Airem and his daughter by Étaín),[2] who, because of her incestuous conception, had been exposed but found and brought up by a herdsman and his wife. One night, in Eterscél's house, she is visited by an unknown man who flies in her skylight in the form of a bird, and she has his child, the future High King Conaire Mór, who is brought up as Eterscél's son.