A Bajoran seer of three thousand years ago who encountered an Orb and wrote prophecies about the Emissary, one of which seems to foretell disaster for a joint Cardassian project at the wormhole.
Trakor was a Bajoran religious figure who lived some three millennia before the 24th century. After an encounter with the Prophets he set down a series of numbered prophecies concerning the Celestial Temple and the Emissary.
They drive the Deep Space Nine episode Destiny. Vedek Yarka warns Sisko that Trakor's Third Prophecy, in which three vipers return to their nest in the sky and the temple gates burn, describes the arrival of Cardassian scientists to set up a communications relay. Kira is half persuaded, and Sisko must decide whether he is a Starfleet officer or the Emissary. When a comet threatens the wormhole the prophecy turns out to be accurate but misread, and the gates are opened rather than destroyed.
Yarka then mentions a Fourth Prophecy that promises the Emissary a fiery trial. Trakor is never seen.