He returned to Lesser Poland in 1243 with Hungarian troops, incl. members of the Sarmatian Zych (Záh) clan, with the aim of putting Bolesław Wstydliwy on the throne of Kraków. His army gathered other Polish knights who advocated for the placement of Bolesław and together they clashed with the army of Konrad and the Masovians at the Battle of Suchodoł in May 1243. After this victory Bolesław took control of Kraków, a move supported by Bishop Jan Prandota. Klement rebuilt the Będzin Castle (near Zagórze and Klimontów) and a Zych garrison protecting the silver mines of Rosperk was placed at nearby Zychcych (Żychcice).
