After he had risen in power, he was able to undermine the credibility of Wallenstein and possibly helped arrange for his assassination.  
At the age of 21 he was appoined Bishop of Lucon, from which he would later rise in the church hierarchy. After he had risen in power, he was able to undermine the credibility of Wallenstein and possibly helped arrange for his assassination.  He also persuaded Gustavus Adolphus to intervene in the thirty years war, in his constant fight against the Hapsburgs.  Perhaps his political machinachines were why he was made a villain in Dumas' the Three Musketeers. This is, FTP,  what French Cardinal and advisor to Louis XIII?
At the age of 21 he was appoined Bishop of Lucon, from which he would later rise in the church hierarchy.
Cardinal Richelieu