Originally Posted by OoAnd1
Okay, without a timeline...
He needed the Cube to find the Matrix.
He needed the Matrix to work the sun-killer device AND then revive Sentinel.
And he needed Sentinel to work the portal devices.
Goal was crazy amount of energy and the ability to transport his planet in order to revive it.
He needed the sun kille device to power the new born decepitcons so that he can dominate the autobots and revive sentinel.