Matrix of Leadership
From MediaWiki
The Matrix of Leadership is an artifact of great power that contains the essence of Primus and acts as a dimensional gateway to the Allspark, through which all living things are connected. It is traditionally carried by the current Autobot Leader.
Not much about the Matrix is common knowledge. Its exact nature remains largely a secret. The Matrix is, however, widely known to possess "The Wisdom of the Ages." This may be due to its nature as a portal to the Allspark. As a Transformer lives and grows in experience, so does its Spark, thus when it returns to the Allspark upon death, its knowledge is added to the whole.
The Matrix is the only thing which Unicron fears.
