Air
- Not to be confused with Air Bar.
Air is the default filling of everything between space and magma, filling all otherwise empty gaps in a world.
Where Found
Air extends to over 1000 blocks above the magma at the center of the world. Above that is space, which although having empty blocks, does not contain enough air to breathe.
If a block is removed, even when not in contact with anything but other solid blocks and water, it will immediately be filled with air.
There's no air in space or bodies of water, such as lakes or oceans.
Uses
Not having its head in contact with air will cause a blockhead to display its air bar and begin decreasing it. A blockhead can refill its air bar by eating kelp.
Air can be passed through easily but cannot be seen. It does not appear to move, thus there is no wind.