Final Fantasy XV: Costlemark Tower Secrets (Sword of the Tall) FFXV

Unlock secret entrance to Sword of the Tall by solving the puzzle hidden inside the Costlemark Tower dungeon. When you reach the bottommost level of the dungeon, the corners of the room floor contains four triggers on downward elevators. Each of these triggers normally leads to a boss room with lots of Red Giants and other monsters. However, one random path inside of elevator maze one will contain a secret trigger that leads to the entrance to a Jabberwock dragon (Level 58). Killing this dragon reveals the Sword of the Tall that was stolen from the Tomb of the Tall nearby Costlemark Tower. Video shows step by step instruction on:
1) Location of Costlemark Tower dungeon
2) Location of Puzzle Room inside the dungeon
3) How to reach the Boss Room from the Puzzle Room
4) How to reach the Dragon Room from the Puzzle Room
5) How to get the Royal Arm: Sword of the Tall
6) Location of secret vault door for End Game
Gameplay walkthrough on PS4 Pro version of FFXV (Final Fantasy 15). #finalfantasyxv #ffxv

0:00 Introduction
0:09 Verify Tomb of the Tall Was Robbed
0:30 Follow Trail To Costlemark Tower
0:58 Note Entrance Is Closed During Daytime
1:17 Wait Until 20 Hour
3:23 Follow This Path Monsters Already Killed!
4:24 You Have Arrived At "Puzzle Room"
5:09 This Is The Boss Room
5:21 A Random Trigger Leads To "Dragon Room"
5:52 Other Path Leads To Boss Room Bad!
6:02 Aways Choose Circle Marking Path
6:26 Find A "Proceed" Mark In Room Corners
7:07 Repeatedly Find "Proceed" And Follow Path
7:24 Kill All Monsters You Meet
10:12 Repeat Steps Until You Reach Large Room
12:38 Note "End Game" Vault Door Locations
12:44 Exit "Boss Room" (Goal Is "Dragon Room")
13:38 Find Another "Proceed" Mark
16:57 Repeat Again But Look For Circle Carving
20:20 Circle Mark Found!
20:33 "Proceed" In Circle Mark Direction
27:50 Touch Circle To Go To Dragon Room
28:46 Kill Level 58 Jabberwock
30:40 Get "Crown City Roast" Recipe
30:57 Use Red Circle To Go Back To Entrance
31:07 Go South To Exit Dungeon