In this skyblock you start from only five blocks of dirt, with the custom recipes and the guidebook, you can improve your island, spawn mobs, explore dimensions, and you can even craft uncraftable things in minecraft, everything in one small map.
it also challenging and very good for challengers (because of the long process)

creator links:

youtube: https://www.youtube.com/channel/UCivRJvQDYysQ20ZJX77mIug?view_as=subscriber

Also, have fun!