The Tuatha Dé Danann (A race of semi-divine people in Irish mythology Previous gods reinterpreted as kings and warriors with magical powers) brought with them when they came to Ireland.
1) The Stone of Fál: The Stone of Destiny. When a true king of Ireland stepped on it, it would cry out. Cp. the Sorting hat & the sword in the stone.
2) The Spear of Destiny: The spear of Lugh, one of the Tuatha Dé Danann Could not be beaten in battle. Parallel in book 7? (Sword, Deluminator, snitch)
3) The Sword of Nuada: Could not be beaten in battle. "The Sword of Light".Cp. Arthur's Excalibur and the sword of Gryffindor.
4) ) Dagda's Cauldron: Magical cauldron that could provide endless amounts of food.