Some time after Sin's defeat, a new type of hobby appeared: sphere hunting to uncover Spira's lost history, although others had their own reasons. Sphere oscillo-finders and similar devices began to detect a sphere with particular properties, since then dubbed an "awesome sphere," in the vicinity of Kilika Island. This sparked theories that the sphere may hold important information, and Youth League decided to acquire it, but was halted by New Yevon who opposes revealing the contents of the sphere, which they most likely kept within the island temple.
The Gullwings learn of the awesome sphere when Buddy detects it from Kilika Island. Seeking the sphere, the Gullwings go to Kilika Island and head to the woods to witness Youth League leader Nooj speaking in front of his people. Within the woods, the Gullwings sneak past the guards by taking a narrow unguarded path. Hearing a conversation, the Gullwings spy on a guard berating a soldier for forgetting the password. Now with the knowledge, the Gullwings go past the guards by telling them the right password. Outside Kilika Temple, New Yevon brings out their machina, which the Gullwings battle. The machina is destroyed and the Gullwings take the awesome sphere.
After the Gullwings steal the awesome sphere from a priest, New Yevon closes off the woods, and by extension the temple. The Youth League closes the gate at the entrance to the woods and only members of the league can pass through. New Yevon barricades the woods and extends the safety measures.