Fuchs' ambitions overreached in the end. He targeted a wealthy woman called Dorothea Flockhlin who had family members at the Imperial court in Nuremberg. They appealed to the Emperor and the Pope and letters were sent insisting Fuchs desisted from further persecutions. He ignored them, sent Bishop Forner to stall for time and had Dorothea Flockhlin executed in flagrant defiance of Imperial and Papal commands. The writing was on the wall by this point. With the Swedish army advancing on Bamberg, Fuchs fled to a safe retirement in Austria. He died two years later in 1633, but in Tinderspark I rectify history's shortcomings by having Quality execute the monstrous Prince-Bishop on the eve of his departure.
As ever with these monstrous people, it's hard to reach inside the mind of Fuchs Von Dornheim. In Tinderspark, I suggest he was a purely venal creature, using the witch hunts as a smokescreen to amass wealth and power and destroy his enemies. He certainly showed no particular loyalty to Pope or Emperor and was happy to arrest judges when they didn't turn up the verdicts he wanted. Yet he clearly saw himself as an ardent defender of Catholicism against her enemies. Perhaps he started out with one set of motivations and became corrupted or perhaps both motives, the spiritual and the egotistical, can coexist comfortably. A better writer than I is needed to do justice to that part of the human paradox.