The Petal Bridge is the fourth stratum of the Labyrinth. It is the highest point in the tree and residence of the Birdfolk. The highest point on the topmost floor, past Harpuia, is the stairway to the heavens - the entrance to the flying castle above.
The trek through this stratum is a long one. The floors are circular, shaped like a tree trunk. The party spends most of their time traversing the circumference of the floors to reach the top, only to turn around and head back down through the unexplored central areas of each floor and back up again to face Harpuia. Along the way, damage tiles return, now more potent than those in the Auburn Thicket, and 19F begins to introduce floating platforms to traverse the vast empty spaces on the floors.
A mysterious passage on 19F takes the party to the unexplored outer areas of the floors, which eventually leads them to the Storm Emperor's throne...
