Costlemark Tower Maze is a Puzzle in Final Fantasy XV. This page would describe the walkthrough into unlocking its rewards.
Rooms and Puzzle
The platform will be the exit when you feel to get out of the area. BE CAREFUL NOT TO EXIT BEFORE READY. Will be open after the first comeback.
These two points will be the areas where you will land when coming back to this room.
These 4 points are interactable devices/elevators.
This area is where the target would be.
These pathways are the only routes to the goal of the maze.
These areas leads to a mini boss fight of red giant and a nagarani with some minions. Another red giant will be added each time you enter the final room maxing at 3.
When reaching this area, there would be a boss fight with a bunch of enemies. Defeating them will reward the Sword of the tall