"Art possessed of" is a phrase that describes the unique qualities of a piece of art, such as its creativity or originality. However, if we are looking for antonyms for this phrase, we could consider words that describe art lacking these qualities. For example, "art devoid of" suggests that a piece of art is lacking in creativity or originality, while "art unremarkable" implies that a piece of art is ordinary or not exceptional in any way. Similarly, "art uninspired" suggests that a piece of art lacks passion or imagination, while "art sterile" implies a piece of art that is devoid of life or emotion. Ultimately, there are many antonyms for "art possessed of," each suggesting a different way that a piece of art might fail to meet our expectations.