When the team finds Merlin himself, they must help him complete the Sangraal weapon before Adria and her Ori forces can track them down.

SG-1 races against Baal in the hunt to find the Sangraal, Merlin’s anti-Ori weapon, and comes up against a series of ancient trials.

The Jaffa take the fight to the Ori, using a genocidal weapon on their new worshipers and landing SG-1 in the middle of a war they can’t control.