this mod adds more dimensions, keep in mind this is a work in progress and it currently only has 3 new dimensions
1: the void dimension, this dimension is filled with nothing but emptyness, the only way to enter is with a bedrock portal. if you enter this dimension without proper protection you will get corrupted. and if a corrupted entity escapes it will fill the overworld with emptyness
2: the sculk dimension. this dimension can currently only be entered in creative. but survival support will come soon. to open this dimension you need a sculk dimension opener. find an ancient city and ignite the big portal. and you will enter this new dimension. but be careful wardens arent rare here at all.
3: The Ether. this dimension is filled with ether. a new block that when combined with a nether star will make a stack of void repellent. a new block that will hold off the void in case a corrupted entity escapes.