There are a lot of things Harry Potter might not have achieved without the aid of the Cloak of Invisibility he received as a Christmas gift in Harry Potter and the Sorcerer's Stone. It would have been impossible for him to sneak into the forbidden section of the library at Hogwarts, and he certainly wouldn't have been able to escape the numerous sticky situations he got himself and his friends into over the years. A magic artifact of such renown is obviously rare, which begs the question: How did Harry Potter get so lucky?
Source：https://www.cbr.com/harry-potter-who-gave-invisibility-cloak/
