Prevalent in ancient Celtic mythology is theTuatha dè Danann (pronounced Too-a Day Dah-nuhn), which means People of the Goddess Danu, and they are believed to be her children.
They are believed to have magically materialized from a cloud of mist from across the northern sea.
They brought with them from across the sea four deeply magical objects:
Lia Fail, the Stone of Destiny (also the Stone of Scone, upon which ancient Irish-and later, Scottish – kings were crowned);
the Invicible Spear of Lugh (which always hit its target mere moments after being thrown, and made Lugh unstoppable in battle);
the “Shining Sword” of Nuada (also called the Sword of Light), which could allegedly dispel truth from lies, enforce the law, dispense justice, and punish the enemies of Ireland;
and the Cauldron of Dagda, which not only continuously dispensed unlimited food and drink to the worthy, but was also capable of healing wounds and resurrecting dead warriors.”D.R. McElroy – Superstitions A Handbook of Folklore, Myths, and Legends from Around the World
The Tuatha dè Danann were immortal and known for their magical abilities, as well as their power, charm, elegance, and cleverness. They were believed to have ruled Ireland four thousand years ago.
They’re described as beautiful and graceful, often have pale or golden skin, and some believe they have Greek origins.
They withdrew to the Otherworld underground beneath the Sidhe mounds when they were invaded and overpowered by the Milesians. Scholars believe the Milesians were most likely the first Gaels in Ireland and ancestors of the modern Irish.
It is thought they continue to practice their magic in the Otherworld. Their courts, towns, culture, and festivities have all been preserved. Humans might venture too far into this Otherworld if they found the secret entrance.