The Omen card, Revelations family, yin polarity, evokes a breath of the future already passing through the present. It signals that a trend is taking shape before it's even confirmed. Drawing this card invites you to observe the first signs of a change underway.
In Oradia's mirror-card system, Omen answers to Awakening: the two don't oppose each other, they answer each other, like two sides of the same movement.
This page gives the card's general meaning. In a real draw, the Omen card is always read in relation to the other cards drawn and the intention set at the start — it's that combined reading, unique to each draw, that the online oracle develops.