"'By my art,' answered Mathgen, 'I shall throw down the mountains of Ireland upon the Fomorians, and they shall fall with their heads to the earth;' then told he to Lugh the names of the twelve principal mountains of Ireland which were ready to do the bidding of the goddess Dana[9] and to smite their enemies on every side. "Lugh asked the cup-bearer: 'In what way wilt thou show thy power?' "'I shall place,' answered the cup-bearer, 'the twelve principal lakes of Ireland under the eyes of the Fomorians, but they shall find no water in them, however great the thirst which they may feel;' and he enumerated the lakes, 'from the Fomorians the water shall hide itself, they shall not be able to take a drop of it; but the same lakes will furnish the Tuatha De Danann with water to drink during the whole war, though it should last seven years.' "The Druid Figal, the son of Mamos, said, 'I shall make three rains of fire fall on the faces of the Fomorian warriors; I shall take from them two-thirds of their valour and courage, but so often as the warriors of the De Danann shall breathe out the air from their breasts, so often shall they feel their courage and valour and strength increase. Even though the war should last seven years it shall not fatigue them.' "The Dagda answered, 'All the feats which you three, sorcerer, cup-bearer, druid, say you can do, I myself alone shall do them.' "'It is you then are the Dagda,'[10] said those present, whence came the name of the Dagda which he afterwards bore." Lugh then went in search of the three gods of Dana--Brian, Iuchar, and Iucharba (whom he afterwards put to death for slaying his father, as is recorded at length in the saga of the "Fate of the Children of Tuireann"[11]) and with these and his other allies he spent the next seven years in making preparations for the great struggle with the Fomorians. This saga and the whole story of the Tuatha De Danann contending with the Fomorians, who are in one place in the saga actually called _sidhe_, or spirits, is all obviously mythological, and has usually been explained, by D'Arbois de Jubainville and others, as the struggle between the gods or good spirits and the evil deities. The following episode also shows the wild mythological character of the whole.