What rhetorical devices are used in Edgar's soliloquy in Act 2 Scene 3 of "King Lear?"
Here are some of the rhetorical devices that Edgar uses in this soliloquy.
First, there are multiple examples of alliteration -- where more than one word in a short space starts with the same sound. For example, he says "happy hollow" and "poor pelting." There are a number of other examples.
Second, there is at least one example of personification. Edgar says that he will be exposed to the "persecutions" of the sky. The sky cannot persecute -- only people can do that.
Finally, I would say there is hyperbole. When Edgar says he is going to take the "basest and most poorest shape" known to man, he is surely exaggerating.