Antonyms for the phrase "reaches depths" could include "soars to new heights," "rises above," or "ascends to the top." These antonyms suggest themes of strength, success, and achievement. Additionally, antonyms could include "floats on the surface," "stays at the top," or "maintains a steady level." These antonyms suggest themes of stability, consistency, and reliability. Overall, antonyms for "reaches depths" offer alternatives that evoke different emotions and connotations, which can be used to vary the tone and message of a piece of writing or speech.