who arrived in Unicron's corpse to claim the Matrix of Chaos. After the clash between Trypticon and Fortress Maximus was over, Megatronus arrived and - at the presence of the renegade Megatron, Windblade, Victorion and Perceptor - murdered Optimus Prime again and claimed the Matrix of Leadership and the Enigma as fundamental parts of his plot to revive Solus Prime in the Well with a machine of his own. Power of the Primes Angered by Megatronus, Windblade, Megatron, Victorion and Perceptor travelled to a Swamp to claim the Requiem Blaster before him, coincidentally recruiting the Combiners Volcanicus, Predaking and the Requiem Blaster's current protector, Optimus Primal. However, Megatronus later arrived to claim back the Blaster as the team was weakened after a showdown with Overlord - who was seeking revenge against Megatron - and Rodimus Cron - a renegade Hot Rod possessed by Unicron after inheriting the Matrix of Chaos. With the Blaster, the Matrix and the Enigma in his possession, Megatronus teleported back to the Well of All Sparks to fuse the three artifacts in a machine that would use the Enigma to combine the essence of the Matrix with the power of the Blaster and drain every Cybertronian's Spark throughout the Universe, bringing the Transformers to their final days. Just as Megatronus's machine was activated, the team arrived and damaged it, causing it to briefly go offline. Angered, Megatronus incapacitated all of the members but Megatron by paralyzing them with painful flames. And just as Megatronus is ready to finish his follower off for good, Rodimus Cron arrives and is completely assumed by Unicron, becoming the new overpowered entity known as Rodimus Unicronus, willing to destroy the Matrix of Leadership and the last remnants of his brother Primus within it, as well as destroying the last surviving Original Prime. As Megatronus and Unicron engaged in the closest showdown between Primus and Unicron ever since the dawn of the Universe, Optimus Primal was able to break Megatronus's machine once and for all with the assistance of Grimlock and Windblade and then he recovered the Matrix of Leadership. Enraged again by another nuisance to his plans, Megatronus attempted to stop Primal, but before this was possible he was able to open the Matrix for himself, becoming the new Matrix-bearer Optimal Optimus. As the fight proceeded, Megatronus was seen fighting the rest of the team as Optimal should fend-off Rodimus Unicronus.