Air

Air is the absence of a Block and was one of the first things created in Minecraft. Air is technically not a block, but Map Editors must treat it as such. Air is completely transparant and can only be destroyed or created by placing or destroying other blocks. Air and Non Solid Blocks are the only space the player and other Mobs are allowed to move.

Creative Mode
In Creative Mode Air is simply all the blank space in a map, up to the edges of it. Air cannot be placed, only made by mining other blocks. Since Water and Lava are infinite here, the fluids will create more respectful blocks of the fluid horizontal and below them to symbolize flooding.

Alpha Mode
In Alpha mode, entering a block will suffocate whatever is inside. Air will restore all bubbles on the Air meter and make it disappear.

Retired Modes

 * Survival Test - Acts the same as Creative Mode, as well as restoring the Air meter.
 * Indev - Affected Fluid blocks horizontal to it. If Air is touching the fluid block, there is a 2/3 chance the Fluid block will disappear and make the pool recede and a 1/3 chance the fluid block will fill the air, making the pool spread. Restored Air meter.
 * Infdev - Worked the same as in Alpha.