The Meta-Mind

The pinnacle of Grue development is the Meta-Mind, supreme intelligence of the Unity. It is made up of the brain-nuclei and bodies of numerous Grue, merged together into a single collective being. Certain Grue Metamorph's are selected for the honor of merging with the Meta-Mind. What most do not know is that these are also the Grue closest to becoming rogues. Their consciousness and potential merges with the greater entity, while also removing the danger of a potential loss to the Unity.
The Meta-Mind still possesses protean traits, but is too massive to mimic most creatures. More important are its formidable mental powers, gained from the fusion of many minds. It is able to mentally communicate with and coordinate Grue across the cosmos, making it the true “mind” of the species. Indeed, while the “core” of the Meta-Mind is made up of its physical structures, all Grue are a part of its greater “mind,” spread out across the stars. Fortunately for the cosmos, the Meta-Mind’s powers are limited to close contact when dealing with non-Grue. The Meta-Mind drives the Unity’s plans for conquest and expansion. In many ways, it is the Unity.
The Meta-Mind dwells in a temple-like cavern deep underground on Gruen Prime, arising from “The Well of the Ancients” when it must physically interact or hold an audience with off-worlders. It is rare for aliens to even enter the presence of the Meta-Mind, and all Grue within the Unity will sacrifice themselves without a moment’s hesitation to safeguard their leader, like white blood cells battling an invading organism within the body.
When dealing with non-Grue, the Meta-Mind sometimes appears to them via view screens and communication devices, but it can also use any Grue in the unity as its “proxy” to relay messages. Such Grue often temporarily shapeshift into a likeness of the Meta-Mind, and some “appearances” of the Meta-Mind away from Gruen Prime are actually its proxies, rather than the entity itself.