Nether Reactor

The Nether Reactor Core is a block, exclusive to the Pocket Edition. It is used to create the Nether Reactor.

Crafting
Crafting it requires three diamonds and six iron ingots.

Nether Reactor
The Nether Reactor is built with a nether reactor core, gold blocks, and cobblestone, arranged in the following configuration:

Note the block in the center of the middle layer represents the Nether Reactor Core.

Top layer:

Middle layer:

Bottom layer:

When the Nether Reactor is built and the core activated, it generates a room of obsidian (7x17x17)with some openings, around the reactor called a "Nether Spire" (Unofficial name) The reactor itself will turn into a new block called Glowing Obsidian resembling netherrack, and it will start spawning various items and blocks, such as gold, melon seeds, paintings, glowstone dust, doors, mushrooms, bones, cacti, arrows, feathers, bowls, sugar cane etc, as well as Zombie Pigmen. The Zombie Pigman texture is different however.

NOTE: The Reactor does not function in Creative Mode; this is intended.

Zombie Pigmen do not spawn in peaceful mode, but you still get the items.

This lasts around 45 seconds. After it is over, there will be a massive obsidian structure with multiple floors.