Various reports note that Cercel managed Transylvanian and Ottoman participation in the Bohemian Revolt. According to István Szamosközy, Marcu arrived in Prague as early as July 1618, and even obtained from the rebels promises that they would make Bethlen ruler of the Czech lands. In discussions with Marcu, the Prince of Thurn pledged 100,000 "scudi" to the Transylvanians, in exchange for their opening a new front against the Habsburgs. Instead, imperials counted on support from two deposed Wallachian Princes. Now allies, Nicolae Pătrașcu and Radu Șerban similarly negotiated payment for a Polish intervention against Transylvania. Cercel's services were rewarded by Bethlen: in August 1619, Marcu received the citadel and estate of Dezna, in Zaránd County; in October, while he was still away, Stanca was granted provisional ownership of Sóspatak (Șeușa) by its lord, the Canon Debreczeni. Little is known about the former Prince after his return to Transylvania, other than that he married a second time, to the aristocrat Druzsina (or Druzsiána) Bogáthy. His death occurred at some point before 1629, when Druzsina is mentioned as the recipient of a widow's pension, also granted by Bethlen. She inherited Dezna, and lived there until 1656. Cercel's surviving brother, Radu Petru, apparently made a final attempt to become Prince in 1611. Before 1620, he was supporting another one of Wallachia's intermittent rulers, Radu Mihnea, who made him an adjunct "Postelnic" and owner of Belizvor estate, in Mehedinți County. Radu Petru also took control of Odobești village, which he claimed was his father's purchase, but lost it under Alexander IV, who reassigned Odobești to Matei Basarab. Radu Petru took monastic orders in 1629, renaming himself Partenie. He was still alive to at least 1634. However, some records of the 1620s show that another Wallachian claimant by the name of Petru was living in Russia, and was also known there by the patronymic "Petrov".