Creation of the Marauders Map. >>>> It's because the map doesn't rely on vision. It shows people's physical place, which is still possible to find if you are under the cloak. Death could not find people under the cloak because Death was relying on vision.
That will be a sad day. But my children will cry with me. Joanne K. Rowling was my childhood, and I will cry- literally cry- on the day that she dies, because I think a piece of my heart will die too.<<I'm literally crying rn