Link to the datapack: https://modrinth.com/project/ultra-hardcore-datapack

How to install

1. Download a resource pack, you should get a .zip file
2. Open the folder to which you downloaded the file
3. Copy the .zip file
4. Open Minecraft
5. In Minecraft, click on "Options", then "Resource Packs"
6. Choose "Open resource pack folder"
7. Paste the file into the resource folder in Minecraft
8. Go back to Minecraft, the resource pack should now be listed