Emberstone

The Emberstone is the artifact of Quintus Prime. It has the ability to seed the explosion of living processes in base elements, akin to Primus's own spark.

The Covenant of Primus
The life-giving powers of the Emberstone worked into the Thirteen's plan to attack Unicron. Optimus Prime's spark was uniquely akin to that of Primus, and therefore an anathema to Unicron. During the mission, Vector Prime teleported Optimus into Unicron's spark chamber, causing both beings to shut down as they rejected each other. The Liege Maximo and Vector arranged a time-loop that would preserve Unicron in this state of hibernation perpetually, and Quintus Prime's Emberstone was used to restore Optimus.

After the war, Quintus made an alliance with Maximo and Megatronus, using the Emberstone to create new, smaller Cybertronian lifeforms. These beasts ultimately proved to be a major catalyst in the downfall of the Thirteen.

When the Era of Primes came to a close, Quintus Prime left Cybertron, intending to use the Emberstone to seed new worlds with life, creating cousins for the new Cybertronians that would emerge from the Well of All Sparks. It would later be used to create the Quintessons.