This is a very simple mod. Basically if you run out of air bubbles you instantly die, no taking little by little damage, once you have ran out of air you die, this makes water much more dangerous and keeping your eye on those little blue bubbles all the more important.
How to install:
- Download and install Minecraft Forge.
- Download the mod.
- Go to %appdata%.
- Go to .minecraft/mods folder.
- If the “mods” folder does not exist you can create one.
- Drag and drop the downloaded jar (zip) file into it.
- Enjoy the mod.