All Spark

In the 2007 Transformers live-action film, the AllSpark (spelled as two words in the movie) is able to bring mechanical and electronic objects to life, essentially turning mundane objects into Transformers. The Autobots and the Decepticons seek the AllSpark throughout the film. The Autobots intend to use the AllSpark in an attempt to rebuild Cybertron and end the war, while the Decepticons desire to create an army of robot soldiers to conquer the universe. The movie's AllSpark is a combination of the Creation Matrix and the Underbase from the US Marvel Comics series, and Vector Sigma from the animated series. The AllSpark takes the shape of a gigantic metal cube with Cybertronian runes carved into it, but is converted by Bumblebee into a smaller form that a human can carry in his hands (described as football-sized in the Alan Dean Foster novelization). During the conversion, the AllSpark is shown to be composed of numerous smaller cubes, which fold inward upon each other to shrink the whole. In the novelization and early movie scripts, the AllSpark is referred to as "the Energon Cube". It is also referred to as "the Cube" several times in the film itself.

History
In the prequel comic book, the AllSpark is described as being of unknown origins, and the reason of existence of the alien race and its planet Cybertron. It is also described as a sacrosanct object that gave them life, sustenance, and kept their society in complete equality and peace. Optimus Prime is shown sending the AllSpark away from Cybertron to prevent the Decepticons from controlling it. The comic book shows, and Megatron alludes to, a wormhole in orbit that the AllSpark is heading towards and then travels through. If it is assumed that the wormhole deposits the Allspark not only spatially but also chronologically (four million years in the past) along with Megatron, this could explain why the Allspark has been on Earth for four million years while the 13 original transformers in Revenge of the Fallen do not appear until 17,000 BC. The prolonged absence of the AllSpark causes Cybertron to die, and forces both sides of the conflict to search the galaxy for it. The AllSpark is revealed to have landed on Earth, in the future site of the Hoover Dam. The AllSpark and Megatron are later hidden inside the Dam by a (fictional) Men in Black-like Federal agency called "Sector 7". In the prequel novelization and film, it is revealed that the Autobots and Decepticons have been seeking the AllSpark for millennia, following transmission signals released by the AllSpark once every thousand years. The Autobots seek it to rebuild Cybertron; when they have become desperate, however, Optimus decides to destroy it rather than let it fall into Megatron's hands. Optimus believes that a new home world can simply be rebuilt by means of the AllSpark once Megatron is no longer a threat. The Decepticons are looking for the AllSpark and Megatron, intending to dominate all life with the use of one and under the leadership of the other. During the battle between Optimus and Megatron, the AllSpark is ultimately driven into Megatron's chest by Sam Witwicky, destroying both the Decepticon leader and the AllSpark. A shard of the AllSpark remains, which is claimed by Optimus Prime before handing it over to the U.S. government for safekeeping on their behalf. Two years later, however, Ravage steals the shard and gives it to the Constructicons so they can revive Megatron with it. The movie also reveals another AllSpark shard that was on Sam's jacket the day he killed Megatron, which transfers the knowledge of the location of the Matrix of Leadership in the form of visions of Cybertronian symbols directly into Sam's mind. Sam entrusts the shard to his then-girlfriend Mikaela Banes, who places it within her father's auto garage. The shard is then later used to reactivate the ancient Seeker Jetfire, who assists the Autobots and their human allies in locating the Matrix of Leadership. In Transformers: The Reign of Starscream (the comic book sequel to the first film), Starscream uses the knowledge gained by Frenzy while inside the Hoover Dam complex from Sector 7 to build a new cube. He then sacrifices several transformer (three or four Autobots and one Decepticon) "traitors" in order to use their sparks to jump-start the cube. Various Autobots are shown throughout the comic as working on the cube - including, at one point, using a hammer and chisel to engrave new glyphs on the new AllSpark. Other than this engraving and activating process, little is shown of the construction of the AllSpark.

Effects
In the film, exposure to the AllSpark can repair Transformers (as shown when it heals Frenzy during the film) and convert Earthly machines into feral Cybertronians. A Nokia N93i cell phone, a Mountain Dew vending machine (named "Dispensor" in the Robot Heroes toyline), the airbag compartment in a sport utility vehicle's steering wheel, and an Xbox 360 are all shown being converted in this way. The cell phone robot is destroyed following the demonstration, but the fates of the other feral Transformers remain unknown and it is presumed they have been dealt with. In Revenge of the Fallen, even as a sliver of its former self, the AllSpark's power is potent, as it brings all of the appliances from Sam's kitchen to life - one of which was a pyromaniac toaster bot, named Ejector in the toy line, among others. Just like the first film, they are seen forming instantaneously and immediately upon contact with the AllSpark's power and then furiously attacking the things nearest to them, armed with a full arsenal of diverse weapons. The kitchen robots, as well as Sam's room, are destroyed by Bumblebee. The energy output of the AllSpark is cited in the prequel comic as having a greater power output than the entire city of Chicago at its time of discovery. According to the comic, the Three Mile Island accident was caused by a failed attempt to extract energy from the AllSpark. On the basis of the second film, it must also be assumed that the AllSpark has a finite maximum power output, about equal to that of a star. In Transformers: The Game, the Autobot Campaign and the Decepticon campaign will determine the fate of the AllSpark. If the player completes the Autobot Campaign, Optimus Prime will use the AllSpark to kill Megatron. If the player completes the Decepticon Campaign, Megatron will become one with the AllSpark and use its power to turn Earth into his own empire by converting all machines into his Decepticon army. In addition, the AllSpark creates small bug-like transformers called "Energon Drones" whenever Energy is expelled from the AllSpark.