A robotic cyborg powered by Redstone. Redstone is a flat transparent block which can transmit redstone power.
Redstone can be obtained by mining or smelting redstone ore, destroying jungle temple traps, crafting blocks of redstone, killing witches, trading with villagers, or by breaking previously-placed redstone dust. It can also be found in chests that spawn in naturally generated structures.
Redstone dust can be broken instantly using any tool, or without a tool, and drops itself as an item. When placed, it will have a hitbox that covers the whole top surface of the block below. In 1.9,[upcoming] the hitbox will only cover part of the surface below, based on the orientation of the redstone.
Redstone dust will also be removed and drop redstone as an item:
if its attachment block is moved, removed, or destroyed
if water flows into its space
if a piston tries to push it or moves a block into its space
If lava flows into redstone dust’s space, the redstone dust will be destroyed without dropping redstone as an item.