(Planar tiefling wizard (conjurer) [he/him] / Doomguard / CE)
Despite being a high-up factor, this Nernstrom is really nothing more than a pawn in a dangerous political game being played between the Doomguard and Graz’zt. This tiefling is one of the Abyssal Lord’s commanders in the Triple Realm, and his membership in the faction was requested by the powerful tanar’ri himself. The leaders of the Doomguard know that Graz’zt is merely trying to get an agent inside their faction, but they haven’t tumbled yet to the exact reason for this. Although the Lord has dealt surprisingly fairly with the faction, the high-ups suspect that he is just waiting for the right time to spring some treachery and perhaps steal a powerful weapon or three. On the other hand, the Doomguard can’t exactly pass up an opportunity to do exactly the same thing to Graz’zt. With Karnacki as member of the faction, the Doomguard will be able to have a base of operations inside the Triple Realm. Any factioneers sent there could be used as spies to get insight into one of the more powerful tanar’ri in the Abyss. It’s simply going to be a matter of who uses whom first.
Karnacki himself is keeping very quiet on the matter of where his true loyalties lie. Although his first allegiance would appear to be to Graz’zt, betrayal is a way of life in the Abyss and he might simply be biding his time before throwing his full support in with the Doomguard. For now, he is content to be a figurehead of sorts within the faction, and do nothing more than host diplomatic parties between the high-ups in the faction and the Abyssal Lord’s commanders.
Source: Ken Lipka