This guide will let you know how to use the Mysterious Map to find the Treasure.
Once you have the map, you need to head to the Tomb of Treachery. Go inside and just keep going using fire to clear out the spider webs until you get to the first door where you can’t go in.
It’s a butterfly door and you have to float the box and then pull it to use it as a ledge. You will need the upgrade upgraded Leviosa for this.
After that, jump up and use the lumos spell to grab the butterfly, the other two are down below. Then head to the room with a little platform in the ground and on three of these, one in the middle and one each on both sides. The treasure will spawn right up out of there.
