Neman appears as the Confounder of armies, so that friendly bands, bereft of their senses by her, slaughter one another; Macha is a fury that riots and revels among the slain; while Morrigu, the greatest of the three, by her presence infuses superhuman valour into Cuchulainn, nerves him for the cast, and guides the course of his unerring spear.
"The Fairy-Faith in Celtic Countries"
W. Y. Evans Wentz