The Mandatory Core is just as the name implies – a mandatory part of each subliminal that ensures it works at the cutting edge of subliminal technology. It is automatically added to every subliminal you start building.
The Mandatory Core helps “glue” your entire subliminal stack together, as well as bind the various modules you select in your customs together in a way that makes them more effective. It is included with every title and does not count against the module count in your custom.