Newcomers often mix up the two main Transformers artifacts: the AllSpark and the Matrix of Leadership. Both are linked to life and to Primus, both appear in the films, but their roles are different.
The AllSpark — the source of life
The AllSpark is the original source from which every Transformer's spark comes. In the 2007 film it looks like a giant cube able to bring machines to life: touch a phone or a vending machine with its energy and it becomes an aggressive little robot. It was the prize fought over in the first live-action film. In the cartoons and comics a similar role is often played by the Well of All Sparks.
The Matrix — the wisdom of leaders
The Matrix of Leadership is an artifact passed from one Prime to the next. It holds the wisdom of its previous bearers and chooses for itself who is worthy to open it. In the 1986 film the Matrix destroys Unicron, and in Revenge of the Fallen it is needed both to activate a deadly machine and to bring Optimus back to life.
In short
The AllSpark is about how Transformers come into the world. The Matrix is about who leads them onward. One gives life, the other gives direction. There's more about the Matrix in a separate Archive article.
