Frodo

Frodo was a great hero who entered Mordor.

Background
Sam and Frodo were at the tower of Cirith Ungol in Mordor. Guarded by the black Watchers, Sam and Frodo were able to pass when Sam held up the elven-glass of Galadriel to them. the glass counteracted the deadly force of the glittering eyes, and the great gate, and the Watchers, were destroyed.