Return to Narshe and take
Terra through the Imperial base cave to the Sealed Gate.
Walkthrough
At Narshe, speak with the leaders and include
Terra in the active party. Fly to the Imperial base and pass through it to the cave beyond. Inside, switches open routes across lava and moving bridges. Search side paths before committing to the final approach.
Some floor panels and bridge controls change the available route rather than simply opening a door. If a path ends, return to the nearest switch and inspect the surrounding platforms. Keep recovery items for the trip back.
At the gate, advance the story and follow the exit after the espers appear. The Blackjack returns to the Vector area. Before the next timed social sequence, save and arrange the active party.
Checkpoint
Terra must be in the party for the gate. Work through one switch-controlled section at a time, checking for paths revealed by changing bridges. Search optional side rooms before approaching the gate if their contents matter, since the story moves on after the esper sequence.