Black Blade from I Parry Everything

A huge black greatsword that is riddled with holes and scars with a two-handed hilt.

A massive black greatsword forged from a mysterious material (this mysterious material is called ideal matter and is known to be able to withstand anything against it. This material came from the Age of Myths, which is 20000+ years ago, which means it can even deflect an attack from a God) that surpasses the hardness of mithril, orichalcum, and any known mana metal. Its origins are veiled in secrecy. The sword is renowned as "The Unbreakable Blade" due to its ability to endure any technique or skill without a single scratch. It can even withstand the devastating blast of the breath of an elder dragon, a force known to obliterate entire nations. The sword was first discovered by King Clays and the Six Sovereign during their expedition into the deepest corners of the Dungeon of the Lost. It was then passed on to Noor as a reward for protecting King Clays' daughter, Lynne.