He is the brother of Krentuk, the krolvin warlord who was slain by local adventurers in the summer of 5112 after he came into possession of the Star of Khar'ta artifact. Kragnack betrayed Krentuk after brokering a deal with Mayor Walkar and local adventurers. As part of the deal, Kragnack would use his own fleet to launch an attack on Krentuk's stronghold back on Glaoveln, trying to overthrow his power. Kragnack also demanded superior weapons be provided for his fleet and that his half-krolvin son, Falzcrow, would be protected in the city since Krentuk had marked the "half-breed" for death. The mayor refused to provide weapons, but it was discovered later on that some locals had offered up some equipment to the krolvin. Mayor Walkar then took Kragnack's son hostage and said he would be safely protected and then released if Kragnack's plans were successful. Angered, Kragnack had no choice but to carry through with his plans, attacked Krentuk's stronghold and overtook it. Hearing of the battle, half of Krentuk's fleet broke ties, departed the Landing and joined Kragnack. The son, Falzcrow, was then released and escorted to safety in or around Icemule Trace.
There has been conflict recently that came in from Darkstone Bay, in the form of at least two nights of krolvin raids. These particularly krolvin belong to a huge fleet commanded by Czag Dubra Kragnack, the brother of the once infamous krolvin warlord named Krentuk, who at one time possessed the Star of Khar’ta. Reports from the western coasts say that Kragnack’s fleet has been slowly returning back north after their nearly yearlong conflict with places like Fairport and Idolone during the War of Shadows. Eye witnesses from Wehnimer’s Landing claim Kragnack now sports a tentacle in place of one of his forearms, and either he, or individuals among his ranks still command power of demons and the undead, having used them to augment their forces in raids on Wehnimer’s Landing in recent weeks.