Day of Reckoning

Prophesied day when all who have renounced the Ori will feel their wrath. Ori Priors spread the word of this event to their followers, who in turn spread it to non-believers.

For the Milky Way Galaxy, the day eventually came to pass when an Ori Supergate was successfully established (where P3Y-229 once existed), ushering the first wave of Ori warships. These vessels devastated an armada of human, Tok'ra, Free Jaffa, Lucian Alliance, and Asgard vessels -- unlocking the Milky Way for the Ori.

KEY EPISODES

The Powers That Be - While on P8X-412, a Prior warns nonbelievers of the Day of Reckoning.
The Scourge - SG-1 share rumors of reports where a day when all shall feel the Ori's vengeance will soon be at hand.
Arthur's Mantle - General Landry discusses the continuing prophecies of impending doom with Teal'c.
Crusade - Val Mal Doran makes contact with Stargate Command, confirming that an event relating to a Day of Reckoning is indeed forthcoming.
Camelot - The first waves of Ori warships enter the Milky Way Galaxy, devastating the fleet opposing them.