The Invisibility Cloak

The Peverell Invisibility Cloak was a pure Cloak that rendered the user completely invisible. Unlike other such cloaks, this one does not fade over time. Some cloaks may start becoming visible but this cloak, given by Death himself, stays as silky as when it was created forevermore. This was one of three Deathly Hallows...

The story behind it goes that Ignotus Peverell, along with his two brothers, fooled Death and Death, sensing greed granted them one wish, fully aware that Ignotus's older brothers would ask for something that would harm themselves. Ignotus tricked Death further by asking him a Cloak that would never reveal the user's presence to anyone once worn. His brothers long dead, old Ignotus passed the Cloak to his son and died a natural death. After this, the Cloak could not be followed through history but a wise Albus Dumbledore found it in the possesion of young James Potter, who used it with Sirius Black to sneak food from the Hogwarts school's kitchens. As both the Peverells and the Potters were pure-blood families, Dumbledore put two and two together and formed a theory that James Potter was distantly related to Ignotus Peverell.