The term 'Delphic Diviner' refers to a type of ancient prophet or seer. The three crossword solutions for this term are SIBYL (5 letters), ORACLE (6 letters), and Sybil (5 letters). A SIBYL was an ancient prophetess who was believed to have the power to predict the future. An ORACLE was a person who was consulted for their wisdom and knowledge in order to make important decisions. Finally, a Sybil was a female prophet or priestess in ancient Greece who was believed to be able to communicate with the gods.