Ultra Hardcore (UHC) is a Minecraft PvP custom gamemode first thought up by the Mindcrack SMP group. I decided to create a datapack to enable the easy configuration of the game inspired by UHC Blox by gerrybrano. No work has been copied from this, however some ideas have been used.

To set up the UHC, download and install the datapack in the datapacks folder of your world. Use the command /function uhc:setup to initiate the pack. Use the book to configure the options. Admins MUST be in creative mode for full functionality in the book. Once you have finished configuring and all players have joined, press the start button.
To stop a UHC mid-game, use /function uhc:stop. Note: The UHC cannot be resumed once this has happened.
To uninstall the datapack, use /function uhc:uninstall. Note: gamerules and world spawn will not be reverted to the pre-datapack state.

The best place to get support, submit feedback and generally discuss the pack is the discord server.