 In 1606, he was with Basta and Galeotto Barbiano di Belgiojoso at Cassovia, trying to uproot the Transylvanian occupation of that city.By 1608, Marcu was in Prague, and, Iorga notes, was regarded as a "second Michael".He was also poised to take the Moldavian throne from Constantin Movilă, but Radu Șerban intervened before this could happen, and put up Mihail Movilă on the throne.