Dragon Quest 11: Ultimate Key Location [All Doors & Chests]

Find the Ultimate Key in Dragon Quest XI to get access to a bunch of post-game rewards and treasures!

The Dragon Quest 11 Ultimate Key is a recurring magical item that has appeared in numerous games in the franchise. Players have to get their hands on it to access a bunch of postgame content, but simply getting to this point will not be easy.

Key Takeaways
  • The Ultimate Key is a recurring magical item in Dragon Quest 11 that allows players to open various doors and gates throughout the game world. It provides access to special areas, treasures, and content that cannot be reached using other keys.
  • To get the key, finish the main campaign of Dragon Quest 11. After the credits, continue playing your saved file. You’ll be prompted to visit the Havens Above area.
  • In Havens Above, locate a chest in the plaza near some grass. This chest contains the Dragon Quest XI Ultimate Key.
  • With the Ultimate Key, you can now access special doors scattered throughout the game world.

What Is The Ultimate Key In Dragon Quest 11?

Dragon Quest 11 Ultimate Key
The Postgame [Image by Us]
  • To put it simply, it is an item that can open any door in the entire game.
  • This also includes those doors that might otherwise require other special keys like the Magic Key.
  • The Ultimate Key essentially makes every one of its peers redundant.

And yes, this key can also open the mysterious grey gates you might have encountered during your incredibly long journey through Erdrea. It’s safe to say that these doors are the main reason you would want to look for the Dragon Quest XI Ultimate Key in the first place because no other key can open them.

How To Find The Ultimate Key?

Dragon Quest 11 Ultimate Key
After The Credits Roll [Image by Us]
As mentioned above, the Ultimate Key is a postgame item. To get it, you must first beat the lengthy main game and allow the credits to roll. After this, you can continue your save game, at which point you should be greeted with the screen above. What follows directly after is spoiler territory, so we’ll skip past that.

Simply play through a bit more of the game, and after a point, you’ll be asked to visit the Havens Above area. You visit This location after you head to the Emerald Coast and meet with the Seer for the first time. She asks you to play the Calamus Flute item to summon a flying whale creature that takes you to Havens Above.

Once you’re finally here, a few brief cutscenes should play out. After the end, a single chest should be seen in the middle of the plaza next to some grass. The Dragon Quest 11 Ultimate Key can be found inside. Grab it.

Ultimate Key Door Locations

Dragon Quest 11 Ultimate Key
Sniflheim Castle [Image by Us]
Now, with the key in your possession, let’s look at all of the special doors in the game that can only be opened with this key. The areas you’ll have to visit are spread around the game world, so expect to do a lot of exploring.

Location Directions
Heliodor Dungeons
  • Head to Heliodor City and then enter the Castle at the top of the map. Now, enter the dungeons from the bottom floor and then descend further until you reach the lower levels.
  • The Ultimate key door should be right around the corner, as a simple prison cell with red chests behind it.

Treasure: Skull Helm and King of the Swindlers recipe book.

The Cryptic Crypt
  • Visit the Hotto Steppe region in the southeast of Erdrea and locate the Cryptic Crypt dungeon in the northwest. Proceed through the area until you reach the room labeled the ‘Cell Block.’
  • A series of multiple rooms here can be unlocked with the Ultimate Key.

Treasure: Metal King Jacket, Field Manual recipe book and Malicious Pandora’s Box.

Gondolia
  • Travel to the port city of Gondolia and search for a gate near Doge Rotundo’s house. It should be right next to a stairway, with two purple banners also hanging near it.
  • Open it up and head inside to find a small area with multiple different red chests.

Treasure: Mini Medal, Pretty Betsy, Agate of Evolution and 50,000 gold coins.

Gallopolis Well
  • When you visit the city of Gallopolis, keep your eyes out for a well directly to the right side of the main gate. You can interact with this to climb into another small area with a few different paths.
  • One leads to a gate that can be opened with your Dragon Quest XI Ultimate Key. There’s only one red chest behind it.  

Treasure: Fire ball.

Puerto Valor
  • There is a house in the southern part of Puerto Valor with a purple shade outside of it and a guard. You can open up the front door easily and then walk up to the second story of the building.
  • You will now find an ultimate key door blocking the terrace. Open this, and then grab the sole chest behind it.

Treasure: Technicolor Dreamcloth.

Phnom Nohn
  • To the east of Phnom Nohn, players can find the Ruins of Nhou Wat. Head to this location, but before you enter the ruins, you will notice a small isolated building towards the northern side of the area map.
  • This is another Ultimate key door, and it only contains one red chest inside.

Treasure: Gold Bar

Sniflheim Castle Basement
  • Head to the city of Sniflheim and enter the castle. Right before the throne room, there should be a lift in the room to the right. Take this down to the castle basement.
  • Now open the door directly in front of you, follow the path and turn left to find another one. The ultimate key door should be right behind this.

Treasure: Chronocrystal and Badges of Honor recipe book.

Insula Incognita
  • Insula Incognita is a deserted location in the Seas of Erdrea. It is the small island to the south of The Strand.
  • Make your way through this area until you reach the southernmost point on the map. Look for the small isolated building with the Dragon Quest 11 Ultimate Key door and open it to find the treasure hidden behind it.

Treasure: Gifts from the Goddess recipe book.

Insula Occidentalis
  • It’s time for you to visit another small island on the open sea of Erdrea. This particular island is located to the north of The Strand.
  • Head to the northwestern corner of the map, past the small, narrow sandy path that leads to another isolated structure. Open it up to find the treasure inside.

Reward: Metal King Armor.

Insula Orientalis
  • Head north from Lonalulu and keep going until you reach the extremely small island, Insula Orientalis.
  • Walk up the dirt path until you reach another tiny building with an Ultimate Key door. Open it to find a single chest inside.

Reward: Circles of Life recipe book.

The Manglegrove – Whale Way Station 
  • When flying in the skies on the whale, head south of the World Tree and land in the location at the direct center of the map.
  • This is The Manglegrove – Whale Way Station. In the southernmost part of this map, you will find another locked door with treasure behind it.

Reward: 3x Chronocrystal.

The Battleground – Level B9
  • Once again, while you are flying, head to the southwest of the map and look for a tall rock structure called The Battleground.
  • Make your way through this entire region until you reach Level B9. There should be an ultimate key door in the south of the floor, blocking the entrance to a cave. The treasure is behind it.

Reward: The Way of the War Goddess recipe book.

Hotto Steppe Northern – Whale Way Station
  • The Hotto Steppe Northern – Whale Way Station can be found on the east side of the map while flying on the whale.
  • Enter this area and then head to the southwestern part of the map to find a Dragon Quest 11 Ultimate Key door. Open it up and loot the treasure inside.

Reward: Sizzling Styles recipe book.

Champs Sauvage – Whale Way Station
  • To the west of the sky map, you will find another Whale Way Station called Champs Sauvage.
  • Land in this area and then walk along the path all the way to the end. You will find another structure here with a locked door.

Reward: 3x Mini Medal.

Sniflheim – Whale Way Station
  • Finally, you should look in the northwestern corner of the map while flying to locate the Sniflheim – Whale Way Station.
  • This is an extremely small area that only has one path leading south. At the end, you will find the final Ultimate Key door.

Reward: Sage Advice recipe book.

This has been eXputer’s Dragon Quest 11 Ultimate Key guide. I hope the extensive explanation has clarified everything about the Ultimate Key in the game. While you’re here, why not check out our Dragon Ball FighterZ Tier List.

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Huzaifa is eXputer's Review Editor, who’s all about RPG games. He’s got several years of experience critically judging games and writing his unbiased thoughts on them. You can also find his content published on sites like Twinfinite & GearNuke. Huzaifa has been gaming for 23+ years, during which he managed to amass 400+ hours on Elden Ring! You can follow his gaming activity on his Xbox and Steam Profiles.

Experience: 5+ years || Previously Worked At GearNuke & Twinfinite || Mainly Covers RPG Guides & Latest Games Reviews || Education: Bachelors in Hospitality.

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