Divine Light
From Transformers Wiki
As the Quintessons invented increasingly elaborate devices to control Vector Sigma, one attempt resulted in a strange prism. Though the Divine Light would potentially allow a being to circumvent Vector Sigma's interface and harness the power of Primus itself, it was for some reason discarded.
The day the Divine Light fell from the sky of Archa Nine is well-documented by the planet's natives. Akalouthans worship the artifact, and their scripture foretells of a time when chosen protectors would arrive to keep the Divine Light out of the hands of the "five-faced demons".
Fiction
3H comics
They failed. Betrayal
But it turned out mostly okay. Wreckers: Finale Part II
Animated cartoon continuity
An "epic battle" was fought over a "potent energy source" on Archa Nine, forcing a Decepticon ship involved in the battle, the Twilight, to crash-land on the spider-infested seventh planet, Archa Seven. The AllSpark Almanac