Mutable Realms has updated the official site's Bestiary with new information about the fearsome "Nadirak" - the death fiend.  Here is what they have to say about it:

"The death fiend is perhaps one of the most frightening of the Nadirak shock troops. Serving as peerless spies, their main function is to capture and interrogate key enemy soldiers. If information cannot be stolen, coerced, or brutally torn from their victims, they will simply assassinate them outright. Although not as strong as the war fiend, nor as resilient as the famine fiend, nor as subtly effective as the pestilence fiend, the death fiend possess unmatched intensity and lust for cruelty in battle." -Kitterwen

For more information about this creature - click here.