*Easily swats the redirected railgun slugs with point defense guns*
Did You Think I Came Unaware? I Know What You Are And What Your Stones Are Capable Of. None Will Have Any Effect On Me. Perhaps You Are In Need Of Education.
-Unit: I.F.S. Armageddon.
-Class: Apocalypse-Class Vessel
The Apocalypse-Class ships were among the final products of the pre-Collapse Federation. Built with the specific job description of being able to permanently kill Elder Gods single-handedly, by a civilization that ranked a solid III on the Kardashev scale, they are immensely powerful, not to mention immensely immense. Approximately the size of a small gas giant, and each weighing in at around 100 times the mass of a typical star system due to being powered by a zero-point energy reactor built of a midsize black hole, one of the Apocalypse-Class's most powerful weapons is in fact nothing more than an offshoot of the gravitic control systems it uses to hide its own mass and refuel itself, allowing it to focus enough gravity on a single point to instantly crumple even the strongest of materials into tiny pellets of neutronium. Considering their nature, it goes without saying that Apocalypse-Class vessels violate several physical laws merely by existing, and the same systems that allow them to continue doing so also provide complete immunity to external sources of reality alteration, an absolute must for ships that were built to fight beings frequently armed with such abilities. These effects even extend to a distance of approximately 5 kilometers outside of the ship's hull, preventing most forms of indirect assault via reality alteration as well. Apocalypse-Class vessels are also heavily armed and armored against conventional threats, mounting enough firepower that shattering entire planets is an easy task, and enough armor and force barriers that resisting such attacks in turn is nearly effortless. They are also fully sentient and sapient, as well as capable of self-repair and self-improvement.
As an individual, I.F.S. Armageddon is a veteran of the Collapse Wars, and one of the last surviving Apocalypse-Class vessels. It benefits from vast experience, as well as the captured essence of half a dozen Elder Gods that no longer exist due to its actions. And, of course, the combination of 'Self-improving' with 'has survived for longer than the entire human race (chronological time; not counting time-travel shenanigans)' has also lead to some frankly ridiculous results.
*generates a gravitational singularity centered on Ultron's forehead, instantly placing him inside the event horizon of a tiny, localized, black hole.*