Just done with reading The war of Vengeance.
A dwarf that says hes from Karak Zorn and becomes a thane in the Prince army. Turns out its a Daemon probably by the name of Htarken.
It pisses me of that he blows up Barak Varrs fleet and kills the only enginer whos building Skyrazan Harbarks. This is two mega setbacks that made both sea and sky warfare imposible.
Dwarf distrust strangers but this "dwarf" can come and go as he please. Be friend with kings, Prince Snorri and thanes.
Its a daemon that twist their brains and so on but to do so for hundreds of years without even getting a litte suspicions from ANY dwarf its so unlikely.