With his father's death, Ladislaus inherited an enormous domain in 1456. The ambitious Ladislaus had his father's main opponent, Ulrich II, Count of Celje, captured and murdered on 9 November. The King, who promised amnesty to Ladislaus under duress, had him arrested in next year. Ladislaus was sentenced to death for high treason. He was executed on 16 March 1457.
