 In 1280, Władysław militarily helped Leszek's ally, the Mazovian Prince Bolesław II, in a battle with Bolesław's brother, Konrad II, and during the expedition won the castle of Jazdów.It is also possible that at a meeting between Leszek II the Black and Przemysł II, Duke of Greater Poland, in Sieradz in February 1284, the marriage of Władysław to Jadwiga, a cousin of Przemysł, was discussed.The following year, in August, Władysław was present, along with Przemysl II and Ziemomysł of Kujawy, when finalizing the reform of the Sulejów monastery, i.e., taking in the monks from the Wąchock monastic buildings.