Their relationship, however, was not always cordial, as scholars Stavrides and Gramatikova mention that Otman Baba frightened Mehmed II with his mastery over the elements, summoning a storm that flooded Constantinople after Mehmed ordered the dervish to enter a monastery. Although Küçük Abdal credits Mehmed II's military victories to Otman Baba's sainthood, the mystic predicted the sultan's defeat in the 1456 Serbia campaign. Otman Baba's relationships with other Ottoman authorities varied. Those opposed to Otman Baba included the orthodox vizier Mahmud Paşa, who did not recognize the mystic's sainthood, and an "akıncı" (military auxiliary), who apprehended Otman Baba and whose wife forced the mystic to pasture ducks for a month. A "sancakbey" (district governor) named Mihaloğlu Ali Bey, however, donated to Otman Baba's tomb after the mystic had supported his military victories.