Obsidian's History
Obsidian alongside his consort Strika were the final Vehicon generals deployed against the Maximal resistance.
Tired of the Maximals using his world as a playground and getting fed up with Thrust's inability to handle them, Megatron selected two Sparks to be his new generals. When Thrust first saw Obsidian and Strika, he remarked "Very nice, boss. Very very nice." However, the feeling wasn't mutual, as Thrust discovered when he started to inform the new guys of their enemies—and was batted away by Obsidian.
Obsidian was quick to act against the Maximals, ambushing Silverbolt and Nightscream with Strika. Screaming "Obliterate!" repeatedly, he pursued Silverbolt but was tackled by Optimus Primal, sending both crashing into the ground. When Optimus tried to reason with him, Obsidian merely fired at him and transformed, escaping into the city. He rendezvoused with Strika and let the Maximals into a trap, as hundred of drones modeled after the two generals surrounded them. Transforming to robot mode, Obsidian remarked "Although he took his name from a great leader, Optimus Primal never learned the first rule of warfare: NEVER underestimate your opponent." The Maximals were able to escape the trap, but found all of their escape routes blocked by drones, Rattrap surprised at the number of drones and Optimus realizing that it wasn't number but tactics; their new opponents were master strategists. Forced to barricade themselves inside the Counsel Citadel, Primal realized that they had been herded there, at which point Obsidian contacted him and offered the Maximals the chance to surrender themselves. Revealing who he and Strika were, Obsidian informed Optimus that "Megatron IS Cybertron. To defend one is to defend the other. And to betray Megatron is to invite death." Despite their advantage, Obsidian and Strika were unable to capture the Maximals due to Botanica's timely arrival, disrupting the drones' targeting systems and allowing the Maximals to escape.
Obsidian's next major move was against Cheetor, Blackarachnia, and Silverbolt. Sent to a shell yard by Megatron and told to wait for the Maximals (as Megatron had sent Optimus a flash about the Sparks and their possible locations, which of course was a trap), Obsidian attacked the trio, outgunning and outflanking them easily. However, a power core thrown by Cheetor was hit by a shot from one of Obsidian's drones even as he was desperately telling them to cease fire, causing a huge explosion that sent him and his drones flying away in a fiery shockwave.
When Megatron began to enact his plan for the Sparks, Obsidian and Strika were stationed to watch over the ground and air around the BFH. While he didn't get to do much personally, Obsidian attempted to engage Savage/Noble in single combat, only to have one of his own drones smacked into him and then Strika thrown into him.
After Megatron's seeming destruction, the generals were at a loss. Without a leader they had no purpose, and when Cheetor and Nightscream approached them with an offer to join the Maximals they accepted, much to Thrust's annoyance: he snarled at Obsidian that if he was loyal to everyone, he was loyal to no one.. A possessed Jet Drone suddenly attacked both the generals and the Maximals, destroying the drones that were present. Obsidian and Strika did not join Cheetor and Nightscream in the fight against the Jet Drone. Later, Optimus welcomed the two to the group and sent them to patrol the inside of the Grand Mal, where they unsuccessfully tried to stop Megatron's depolarized Spark from entering. After Megatron was re-polarized and bonded to a Diagnostic Drone, Obsidian and Strika seized him and made their escape, pledging their loyalty to evil once again. Obsidian admitted it was Thrust who had made him and Strika realize where their loyalties lay.
The conflict came to a head when Megatron began an all-out attack on his former base, seeking to reclaim the Sparks. Obsidian fell victim to Rattrap's identity scrambler, destroying several of his own troops before realizing his mistake. He later returned to his main fleet that was attacking the BFH, but they were unable to penetrate the shields. That changed when Megatron found a device Rattrap used to send Botanica back to the surface—a shield harmonic device synchronized to the base's shields. Obsidian and Strika were then able to fire through the shields and destroy the base's drive units, sending it plummeting into the Citadel.
After repairing and placing his troops, Obsidian began a second attack on the Grand Mal with Strika and Thrust. Taking down the shields and defeating several Maximals, the trio were left with only Cheetor in their way. However, the Maximal led them into the engine room, where he brought the anti-gravity generators online and sent Obsidian and Strika into Cybertron's orbit.