The term "art casualty" typically refers to a piece of artwork that has been damaged or destroyed in some way. Antonyms for this phrase would include "art triumph," "art success," "art preservation," or "art restoration." These words suggest a positive outcome for the artwork in question, such as a successful restoration or preservation effort that has saved it from destruction. They also imply a sense of triumph over difficult circumstances, or a celebration of the inherent value and importance of art. In contrast to the negative connotations of "art casualty," these antonyms convey a message of hope and optimism for the future of art and cultural heritage.