Mini-Con Matrix
From Transformers Wiki
The Mini-Con Matrix was created by the Mini-Cons of Over-Run's universe who, unable to save themselves or their world from being destroyed by Unicron, merged their spark essences into an artifact which might give another universe hope for survival.
Fiction
Dreamwave Armada comics
The Matrix was brought into another universe by Over-Run, a Mini-Con who had escaped the destruction of his own universe. Worlds Collide, Part 1 of 4 Over-Run protected the Matrix from Unicron's heralds, eventually bringing it under the protection of the Autobots. Worlds Collide, Part 2 of 4 In a mission to rescue Optimus Prime, who had been shunted into another reality, Over-Run used the Matrix to enhance Optimus Prime and Jetfire's power to a level which could gave Unicron pause. Worlds Collide, Part 4 of 4 In the final battle with Unicron, the Mini-Con essences within the Matrix were amplified by the living essences of the Mini-Cons of this universe to help defeat the planet-eater. The End