Branth told you about Phanon's discovery. Phanon claimed that Beritra had created an Invasion Corridor leading to Tiamat's secret. Branth asked you to get there before Beritra and capture the corridor. However, the Invasion Corridor did not lead where Phanon said it would. The Captain of the Invasion Troop had set you a trap. Phanon was being controlled by the Balaur though a Seed of Rule, and had supplied the Daevas with misinformation. You told Branth everything. Branth realised that the enemy was still searching for Tiamat's secret, and he recommended that you pursue Beritra as quickly as possible.