Antigod

The Antigod is presumably something very bad from the IDW portion of the Generation 1 continuity family.

You can't see me!

_{This character has no official visual representation in any Transformers product or media... yet, at least.}

Little is known about the so-called Antigod other than its name, but it's certainly a name that inspires terror. Of course, that may be misdirection.

Fiction

IDW Generation 1 continuity

While discussing seemingly peaceful societies that have dark undersides with Rung and Skids Rewind revealed that the inhabitants of Cuddlex in the Benevolon Sector were breeding haemoslaves to fight in service to the Antigod. Signal to Noise

Notes

• It's possible the Antigod is a deity of some kind, or something like the opposite.