... The ill-gotten son of the Morrigan. Mechi was born with three hearts, and inside each heart was a serpent with three time three poisons for the land of Eire. Mac Cécht killed im on the banks of the Barrow, according to the Dindschenchas. He cut out the hearts and burned them in the hottest of fires and when he was done, he spread the ashes on the river, to be washed out to sea. And this is how Mac Cécht saved all of Eire from the perils of the Morrigan's poisons.