divinatory, mantic, sibylline, sibyllic, vatic, vatical -- (resembling or characteristic of a prophet or prophecy; "the high priest's divinatory pronouncement"; "mantic powers"; "a kind of sibylline book with ready and infallible answers to questions")
cabalistic, kabbalistic, qabalistic, cryptic, cryptical, sibylline -- (having a secret or hidden meaning; "cabalistic symbols engraved in stone"; "cryptic writings"; "thoroughly sibylline in most of his pronouncements"- John Gunther)