Kthuizhag, Guardian of the Far Realm

There have been distinct moments in the Forever War where, in response to the aggression of the Far Realm, some worlds have invaded into its sphere of influence in retaliation. When driven to the edge of their domain, the Primordials and all lesser abominations flee into the protective embrace of Kthuizhag.

The immortal flesh of all Far Realm Primordials is linked to the existence of Kthuizhag, whose symbiotic relationship with its kin allows them to suffer all forms of obliteration without fear of true death. If it were to fall, however, a large enough gap in the defenses of these monsters could be created, such that they could be induced into the Eternal Slumber once again. But who is mad enough to challenge such creatures on their terms, in their own realm?

We need a hero.