This mod only does one thing, it adds a void world option in the world type list in the "create world" screen. This mod is ideal for skyblock packs since it isn't shipped together with other mod content (i.e. Botania GoG).
The worldgenerator type that can be used on servers is called: "voidworld:voidworld"
Current config options are "Island Size" and "Spawn Block" (aka what block the island is made out of). More config options will follow in the future, and perhaps also some player spreading abilities! (aka separate island for every player/team)
If you are looking for a questing mod for your pack, then you are in luck, I also made one! CustomQuests
Discord:
Click here
Start a void world by selecting it:
You spawn on a piece of dirt: