The Sands

'The Sands is, as the name implies, a lot of sand, possibly from the Nether and/or created by Israphel. During The Sand War, it acted like a disease and spread all over Minecraftia, causing people and animals to die of hunger, thirst and, no doubt, sunburns. The people of Minecraftia somehow managed to "fight" The Sands, and built The Wall, which contains it to The Desert.

Appearances
The Sands has appeared in small amounts outside The Desert:
 * Outside the Nether portal in The Cave of Terror
 * Outside the two portals below Crumbling Ruins