seriously injured. Despite that, thereafter he participated in the capture of Fürstenfeld, where he stormed the defenders at the castle gate with his small unit. Ottokar II invaded Hungary in the spring of 1271, capturing several forts, but Stephen won the decisive battle on the Rábca River on 21 May. At the gate of Abda, Rubinus "bravely defended the crossing". Ladislaus' loyal soldier Ladislaus IV was crowned in Székesfehérvár on about 3 September 1272. During his minority, many groupings of barons fought against each other for supreme power, but Rubinus remained faithful to the royal authority. Ladislaus' charter referred to an episode, when German knights, namely Conrad and Kunchlinus broke into Zagorje County, Rubinus stopped and chased their army. He also participated in Matthew Csák's military campaign in 1272 to besiege the fort of Lembach at the Carinthian border. On 3 August 1275, Rubinus and his two brothers, Feldricus and Charles were granted the estate of Petlend, belonged to Vasvár Castle, by King Ladislaus IV. During the Battle on the Marchfeld, took place on 26 August 1278, where Ottokar II was defeated and killed, Rubinus captured thirteen Bohemian lords, according to Ladislaus' charter. After the battle, Rubinus was appointed Vice-voivode of Transylvania () in that year (Finta Aba served as Voivode during that time). In this position, he was involved in a jurisdictional conflict with Palatine Matthew Csák, who urged the udvornici in Vas County, who were administered by the Palatine, to accept his candidate and deputy, comes Stephen to become their authorized captain and judge, in the name of Matthew Csák. His charter also referred that vice-voivode Rubinus had previously unilaterally appointed a judge, which he deemed unlawful. Based on the charter's terminology, it is conceivable that Rubinus already held the office of ispán of Vas County since that year. In early 1280, papal legate Philip, Bishop of Fermo and the Hungarian lords extracted a ceremonious promise from the Cuman chieftains of giving up their pagan customs, and persuaded the young King Ladislaus to swear an oath to enforce the keeping of the Cuman chieftains' promise. Many Cumans decided to leave Hungary instead of obeying the legate's demands. Ladislaus followed the moving Cumans as far as Szalánkemén (now Stari Slankamen in Serbia), but could not hinder them from crossing the frontier. Rubinus, as leader of the udvornici from Vép participated in the campaign against the Cumans, where defeated them