Final answer:
The rhetorical devices used in the given lines are repetition and tricolon. Repetition is the use of the same word or phrase multiple times for emphasis, and tricolon is the repetition of a grammatical structure in three parallel clauses or phrases.
Step-by-step explanation:
The rhetorical devices being used in the given lines: "I myself will take up arms, I myself will be your general, judge, and rewarder of every one of your virtues in the field" are repetition and tricolon.
Repetition is the use of the same word or phrase multiple times for emphasis. In this case, the word 'myself' is repeated twice.
Tricolon is a rhetorical device that involves the repetition of a grammatical structure in three parallel clauses or phrases. In this case, the speaker repeats the structure 'I myself will...' three times for emphasis and to create a powerful effect.