Primus, the creator-god of the Transformers, exists as the sentient core of Cybertron, his planetary embodiment. Originating from a multiversal entity forged by "The One," he personifies the universal force of good, opposing his twin brother Unicron across infinite realities. His essence flows through artifacts such as the Matrix of Leadership, the AllSpark, and Vector Sigma—a supercomputer housing his consciousness and serving as a conduit to his power. In *Transformers: Cybertron*, Primus’s lifeforce intertwines with the Cyber Planet Keys, mystical relics forged from his own spark. These keys once powered an ancient space bridge network connecting inhabited worlds, but their disappearance triggered a cataclysm when a black hole threatened Cybertron. Awakened by the Autobots’ retrieval of the keys and activation of the Omega Lock, Primus channels their energy to restore Cybertron and manifest his planetary form. This awakening enables him to confront adversaries like the enhanced Starscream and Galvatron, ultimately sealing the black hole to safeguard the cosmos. Primus’s origins trace back to an eternal conflict with Unicron, which concluded with both beings imprisoned as celestial bodies. While Unicron evolved into a devouring world-eater, Primus reshaped himself into Cybertron, birthing the Transformers as his protectors. His spark generates Energon, the lifeblood of Cybertronians, and sustains the Well of AllSparks, which spawns new Transformer sparks. Though a deity, Primus often lies dormant, delegating his will through proxies like the Thirteen Primes or Autobot leaders such as Optimus Prime, who inherits his purpose via the Matrix. His vulnerabilities include susceptibility to Dark Energon, Unicron’s corrupting essence, and reliance on external agents to fulfill his strategies. When Megatron poisoned Cybertron’s core with Dark Energon, Primus fell into stasis, necessitating Orion Pax’s transformation into Optimus Prime to purge the corruption. The Covenant of Primus, a prophetic tome, outlines his grand design, yet his creations’ propensity for civil war underscores his fallibility. Later narratives redefined Primus’s multiversal singularity, permitting divergent interpretations across realities. One continuity reimagined him as Rung, the first Cybertronian, stripped of divine attributes. However, *Transformers: Cybertron* reaffirms his role as a dormant guardian whose power emerges through unity and sacrifice, epitomized by Vector Prime’s self-obliteration to secure Primus’s triumph over annihilation.