Roman Republic
Shortly before 312 BCE, the Plebeian Council enacted the Plebiscitum Ovinium. During the early republic, only consuls could appoint new senators. This initiative, however, transferred this power to the censors. It also required the censor to appoint any newly elected magistrate to the senate. By this point, plebeians were already holding a significant number of magisterial offices. Thus, the number of plebeian senators probably increased quickly. However, it remained difficult for a plebeian to enter the senate if he was not from a well-known political family, as a new patrician-like plebeian aristocracy emerged. The old nobility existed through the force of law, because only patricians were allowed to stand for high office. The new nobility existed due to the organization of society. As such, only a revolution could overthrow this new structure.

Q: Who could a newly elected magistrate expect to be appointed by?
the censor