Mogahn the Mass
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You can't see me!
This character has no official visual representation in any Transformers product or media... yet, at least.
Mogahn the Mass threatened all of reality.
Fiction
Ask Vector Prime
The eldritch Mogahn the Mass was absorbing entire star systems (including the stars!) into himself, while also able to wield a Cyber Caliber, and was the greatest and final threat that the Time Warriors fought. They fought him across countless realities. All was almost lost until Vector Prime gained the mighty Rhisling and smote Mogahn so hard that his remains went back in time and detonated in the Big Bang.
When Mogahn manifested in a universe, even Unicron steered clear. You reading this all owe Vector, is what I'm saying. Ask Vector Prime, 2015/07/12
Notes
- Mogahn the Mass originated in the pseudocanon work, "Alignment".
- Ask Vector Prime would later note, in a decidedly tongue-in-cheek answer, that, somewhere in the Multiverse, the "Mo" in Lord Mo Zarak stood for Mogahn.