Trunn derived a great deal of his knowledge from spiders, or so he said. His leadership style hardly reflected that, with capricious promotions and almost paranoid executions. However, he was a cunning and skillful commander, amongst the few attackers ever to breach the mountain fortress of Salamandastron, and the only one to actually conquer it. He was also a skilled fighter, being one of the few villains that was able to fight a badger on even terms. In battle, he used sheer numbers--and intimidation derived thereof--as his most powerful weapon. His most trusted associates were the Grand Fragorl, High Magician Groddil, Captain in Chief Karangool and later Captain Ripfang. He called any creature that wasn't in his hordes "lesser orders" and announced himself better than them. His hordes fought in a zealot-like style, hurling themselves at their enemies regardless of their own lives.
Trunn was one of the few warlords to actually enter Salamandastron and occupy it for a period of time. He was defeated in battle by Lord Brocktree, who crippled the wildcat and tossed him into the sea. He later washed up on shore some distance away, where Groddil was sitting. He begged Groddil to save him, but Groddil—-perhaps in retribution for Trunn killing his family in the past or for throwing him in the cellars of Salamandastron—-allowed the wildcat to be washed out to sea, where he drowned.