Costlemark Tower Secrets in Final Fantasy XV

You have to verify tomb of the tall was robbed.

And follow the trail to Costlemark tower.

You will notice that the entrance is closed during daytime.

So you need to wait until 20 hour.

After that, enter Costlemark tower.

And follow this path( monsters already killed).

You have arrived at the "Puzzle Room".

Puzzle Room corners have triggers.

Each trigger is on the down elevator platform.

Each trigger is marked by rock columns.

They lead to "Boss room" or "Dragon room".

Which triggers lead to where it is random!

This is the "boss room".

But the goal is trigger to this "Dragon room".

A random trigger leads to "Dragon room".

Which one? depends on floor marking.

The circle carving leads to "Dragon room".

Another path leads to "boss room" (bad)!

You always have to choose the circle marking path.

Now continuing the walkthrough to "Dragon room" and getting the royal arm: getting the royal arm: "Sword of the tall".

You will need to find a "proceed" mark in the room corner.

Press X to proceed.

Repeatedly find “proceed” and follow the path.

You need to kill all the monsters you meet.

And repeat the steps until you reach a large room.

You have to kill the bosses in this "boss room".

Note end game vault door location.

Exit "Boss room" (Goal is dragon room).

You are in the Puzzle room again.

You will need to find another proceed mark.

Repeat again but look for circle carving.

Circle mark found!

Proceed in circle mark direction.

After that, follow the path to circular elevator room.

Touch circle to go to dragon room.

You need to kill level 58 Jabberwock.

And then kill level 58 Jabberwock.

Get stolen sword of the tall.

Get crown city roast recipe.

You can use a red circle to go back to the entrance.

And then head south to exit the dungeon.