For 10 points, name this composer of the first fully-sung native Russian operas, Ruslan and
 Lyudmila and A Life for the Tsar.
In one of this composer's operas, the hero is advised by Finn to cut off a dwarf's magic beard and is
 waylaid at the palace of Naina. That hero of an opera by this man is briefly impeded by Farlaf, who, like
 the poet Ratmir, had been rejected as a suitor by the princess. After granting permission for Antonida to
 marry Bogdan Sobinin, the protagonist of another of this composer's operas is killed in the Enchanted
 Forest. Ivan Susanin had deceived some Poles who were attempting to kidnap Mikhail Romanov in that
 opera. For 10 points, name this composer of the first fully-sung native Russian operas, Ruslan and
 Lyudmila and A Life for the Tsar.
In one of this composer's operas, the hero is advised by Finn to cut off a dwarf's magic beard and is
 waylaid at the palace of Naina.
Mikhail Ivanovich {Glinka}