The Morrígan is a goddess of battle, strife, and fertility. Her name translates as either "Great Queen" or "Phantom Queen," and both epithets are entirely appropriate for her.
The Morrígan is primarily associated with fate, especially with foretelling doom and death in battle. In this role she appears as a crow, flying above the battlefield. The Morrígan has thus been likened to the Valkyries of Norse mythology and Norns of Germanic mythology. She is also associated with sovereignty, and her connection with cattle may also suggest an association with wealth and the land.
The Morrígan is often described as a trio of individuals, all sisters, called 'the three Morrígna'. Although membership of the triad varies, the most common combination in modern sources is Badb, Macha and Nemain.
The Morrigan frequently appears in the ornithological guise of a hooded crow. She is one of the Tuatha Dé Danann ("Tribe of the goddess Danu") and she helped defeat the Firbolg at the First Battle of Mag Tuireadh and the Fomorians at the Second Battle of Mag Tuireadh.