Level Timer

This custom challenge removes one experience level every minute. If you run out of experience, you die. A bossbar at the top of the screen will display the progress of the level timer, allowing you to see how much time you have left.

This data pack was originally made for version 1.17, but it still works up to 1.20.4 (and probably later versions if you're reading this in the future).

If you want to uninstall this data pack, you will have to remove the files from the datapacks folder, as well as running /bossbar remove minecraft:level_timer to remove the bossbar.