Lord Magistrate (Stormwind)

The Lord Magistrate, who shall be the arbiter of law in the King's stead within the realm, is appointed directly by the king. Which is to say that in these trying times the King is busy with other things, like killing orcs, so that the balance of power in civil governance between him and the House of Nobles probably means that they recommend a Lord Magistrate to His Majesty, who then says “jolly good” according to the principles set out above.

The Lord Magistrate has to already be a member of the House, and once sworn in his task includes trying serious offences, arranging trials and appeals, and appointing and overseeing magistrates. His assent is needed for people to become magistrates, and he can choose to investigate individual justices if he hears reports of their misconduct, dismissing them if necessary. He's also got a passing responsibility to help recruit new magistrates, although he can appoint an officer to do this for him.