In The Ancient Forest Of Luthimn, you will find MASSIVE trees, there are at least 50 of them and you get lost easily, you will have to find all the secrets and chests, play on at least Easy difficulty, no mods aloud, it is also hard because you can not go mining for diamond, to find diamond you have to look through all the trees trying to find a chest with diamond, then you will need to find coal, then a furnace, there is only 1 Master chest in the map at the moment, which contains tonnes of diamonds, a full diamond set and more!