The rhetorical device used is a simile, comparing tyranny to hell to emphasize the challenging nature of conquering tyranny and the subsequent triumph.
The rhetorical device used in this excerpt is simile. A simile is a figure of speech that directly compares two different things using the words 'like' or 'as.' In this case, the comparison between tyranny and hell is used to emphasize the difficulty in overcoming tyranny and the eventual glory of achieving freedom.
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