The Tuatha De Danann

Descended from Iobath the third chief of the race of Neimheadh are the Tuatha De Danann, who left Ireland after the destruction of the tower of Conang. In the course of their wanderings they learned magic until they became skilled in every trick of sorcery. Eventually they went to the country of the Lochlainn where they were welcomed and got four cities that they might teach the young. After some time there they passed to the north of Scotland, and spent seven  years  at Dobhar  and  Iardhobhar before coming to Ireland.

Having landed in Ireland they burned their ships and covered themselves, we are told, in a druidic mist for three days. Thus they escaped observation by the natives until they reached Sliabh an larainn. Thence they sent an embassy to the Fir Bolg to demand the sovereignty of the country. The battle of Magh Tuireadh south resulted and the defeat of the Fir Bolg already referred to. The victors had brought with them four rare jewels, namely, the Lia Fail, the Sword of Lugh Lamhfhada, the Spear he had when prepared for battle, and the Cauldron of the Daghdha, which provided amply for a whole company.