Nether Reactor

The Nether Reactor is a built structure which, when activated, generates a room of Netherrack (7x17x17) with some openings around the reactor called a "Nether Spire" (unofficial name). It also turns the reactor itself, excluding the core, into Netherrack (or obsidian for iOS, confirmed for 0.6.1). At this point the reactor will begin to spawn various blocks and items, as well as Zombie Pigmen.

The Nether Reactor is built with a nether reactor core, 4 gold blocks, and 14 cobblestone, arranged in the configuration above.

Behavior
LIESSSSSSSS The Zombie Pigman who spawn are hostile to the player, unlike the ones in the PC or Xbox versions.

Bugs

 * If placed at bedrock, when the reaction occurs, it will remove the bedrock. Using this, one can access the Void in Survival mode.

Trivia

 * The Reactor does not function in Creative mode; this is intended.
 * The reactor's structure was originally iron and gold blocks rather than cobblestone and gold, but this was changed due to its cost and the fact that the reactor turns everything into obsidian except the core.
 * The air blocks in the pattern are not optional. This means the player cannot build the reactor underwater unless you waterproof the air blocks in the pattern.
 * The player can quickly mine some or all of the materials out of the reactor after activation and it will still function. This way the player can recycle the expensive Gold Blocks. Another alternative method is to simply have someone else help mine the blocks right after activation. If they're fast enough, they'll have time to mine all four gold blocks with a diamond pickaxe before they turn to obsidian.
 * If the player constructs the reactor near a world edge and activate it, they will see it turn night.
 * There is an elevation limit for the reactor, above which it cannot be activated.
 * If the player wants to hide the spire produced by the reaction, they must build the reactor deep underground.
 * If the player wants the spire not to get "blown up", you can break the active core.
 * The spire makes a good mushroom farm due to the low light levels inside it. Mushrooms spread really quick when in the spire.