Ultimate Key

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Ultimate key
Japanese さいごのかぎ
Romaji {{{romaji}}}
Old localizations Final key
Found in Dragon Quest III
Dragon Quest IV
Dragon Quest V
Dragon Quest VI
Dragon Quest VII
Dragon Quest VIII
Dragon Quest IX
Effect Unlocks any lock.

The Ultimate Key (Originally Final Key) is a recurring magical item that can change its appearance to fit any possible lock. It is necessary to advance the later stages of a game's story, usually by opening a jail door.

Types of Doors[edit]

The Ultimate Key opens all the types of doors in Dragon Quest III. This includes thief doors (yellow, plain), magic doors (silver, ornate), and final doors (grey, prison-like). As the final key opens all 3 types of doors, it renders the other key types obsolete.


Dragon Quest III: The Seeds of Salvation[edit]

The Ultimate Key is found at the Shallows Shrine, which requires a mini-quest to be completed in order to enter the shrine.


Acquiring the Ultimate Key is one of the first major tasks the player must accomplish after receiving the ship in Portoga. It requires visiting at least 2 separate locations.


The village has an item shop which sells Fading Jennys. These herbs turn the Hero's party invisible for a short amount of time. An herb needs to be purchased here, or otherwise the party must grind a Mage or Sage to Lv33 to learn Fade as an alternative.


The castle is guarded so that outsiders may not enter by normal means. By using a Fading Jenny or the Fade spell, the Hero's party can sneak by the sentries guarding the entrance. Inside, there is a boulder puzzle located on the second floor which must be solved. The player must push three boulders around water hazards into a straight line on the north wall. After successfully completing the puzzle, the Hero is rewarded with the Bottomless Pot.

North Central Sea and Final Key Shrine[edit]

In the north central sea (just north of where the two peninsula cross each other), there is a small grouping of shoals in a 'T' pattern. By guiding the ship adjacent to the south center shoal, the Hero can use the Bottomless Pot to raise the Shallows Shrine. Inside the shrine, the final key is located inside a chest.

Dragon Quest IV: Chapters of the Chosen[edit]

The Ultimate Key is given by the Queen of Femiscyra after confronting the rosary thief. It is needed to obtain the Zenithian shield in the basement of Femiscyra Castle.

Dragon Quest V: Hand of the Heavenly Bride[edit]

The Ultimate Key is obtained after defeating Bjørn the Behemoose. It is necessary to obtain the Zenithian armour in Crocodilopolis as well opening the door in the Estuary Sanctuary leading to the portal to Nadiria.

Dragon Quest VI: Realms of Revelation[edit]

The Ultimate Key is found at Sunken Ship, which requires a Lorelei's Harp to be found.

Dragon Quest VII: Fragments of the Forgotten Past[edit]

The Ultimate Key is found at Cathedral of Light.

Dragon Quest VIII: Journey of the Cursed King[edit]

The Ultimate Key is given by Marta shortly before she is murdered by Rhapthorne. It is needed to find the pirate's map.

Dragon Quest IX: Sentinels of the Starry Skies[edit]

The Ultimate Key is obtained in the Gortress after defeating Goreham-Hogg. It is needed to free the captured celestrians.

Dragon Quest XI: Echoes of an Elusive Age[edit]

The Ultimate Key is obtained in a chest located in Havens Above. The Key is only obtainable in the post-game.

See Also[edit]