L'assaut final

Red Alert emerges from below Cybertron; damaged, but functioning. The planet's surface appears trashed with debris from buildings and structures.
Inside Unicron's core chamber, Optimus Prime and Galvatron notice the 3 Mini-Con weapons are linked to Unicron, wrapped under organic tendrils. Sideways exits Unicron's heart and he adopts the planet's voice as he tells his origin. Sideways is a shell of Unicron and he's been on Cybertron for eons, observing (and encouraging) the Transformers' war. Able to absorb their negative energy from fighting and hatred, Sideways powered Unicron enough to grow into the planet, now strong enough for total domination!
Outside, the Armada is suffering losses, but then Sideswipe successfully blows up a hole in Unicron's neck. The jet fighters enter, dodging internal planetary defenses.
Meanwhile, Galvatron and Prime are captured by the organic tendrils, which bond to Galvatron, putting him in suspended animation. With the matrix inside him, Prime is able to

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S01E52 - Le dernier combat