Is regular Skyblock just too boring for you?
Well, this datapack may be just the thing for you then.
This datapack focuses around one main idea: Survival when the overworld is a singular bedrock block. All you need to do is simply create a new world with this datapack included, and your new challenge will be ready.
Everything available in vanilla survival can also be obtained here through the use of crafting, or scavenging.
In addition to replacing the entirety of the overworld with a void world, this datapack also overhauls nether generation. The nether has increased verticality, and smoothened generation. No new biomes were added to the nether, but the overworld consists of purely custom biomes.
The datapack includes several custom advancements that can be seen in the regular advancement menu. These provide both unique challenges, and some guidance on what to do.
Important Notice: This datapack will likely not work properly if applied to a world after creation. Ensure you add it to the world during the creation process. It is intended for 1.19 versions of Minecraft.