You can create a portal which opens to soulther and you can travel, and this world is like nether but there is only soul sands and soul ores. You can craft pickaxe, shovel, battle axe and armor from soul ore. If you have all soul armor, if you press [G] (default) it opens an effect boost menu for you and you can choose whick effect you want to get. There is some structures in soulther and if you find it there is black blocks on top 4 area and if you right click them it turns into a chest and there is so much spawner in this structure, some soul spawners too. Soul spawners summons lower than a normal spawner and it only spawn living souls but it spawns only 1 living soul and there is a little chance of that, living soul can drop its heart and if you press [Y] (default) opens a boost menu and if you put this heart to this slot and press [Z] (default) you will fly and if you press [X] (default) you wont be flying. (note: it dont affects other dimensions, example: if you put a heart in overworld it you should put another in nether) There is no trees but in the structures you can find log and you can make a log converter and you can change oak log to soul log, soul log to oak log, oak leaves to soul leaves, soul leaves to oak lives. If you want to get all stuff in creative you can use this command ( /givesoulall ). Be careful while fighting with living souls, they are super strong.