The Morrígan
The Morrígan also appears in the "Cath Maige Tuired" ("The Battle of Magh Tuireadh"). On Samhain, she keeps a tryst with the Dagda before the battle against the Fomorians. When he meets her, she is washing herself, standing with one foot on either side of the river Unius. In some sources, she is believed to have created the river. After they have sex, the Morrígan promises to summon the magicians of Ireland to cast spells on behalf of the Tuatha Dé, and to destroy Indech, the Fomorian king, taking from him "the blood of his heart and the kidneys of his valour." Later, we are told, she would bring two handfuls of his blood and deposit them in the same river (however, we are also told later in the text that Indech was killed by Ogma).