The Key-Tanas were three key-shaped swords that exist in the virtual world of Prime Empire. The ninja traveled across the game to find them and took them to the fire wall in order to enter Unagami's throne room.
The yellow Key-Tana was briefly shown when the Speedway Five-Billion was being advertised.
When several Avatars tried to get to the purple Key-Tana, Okino tried to lead them to it, but failed, as the players lost their four lives and turned into energy cubes. However, when the ninja met Okino, the latter promised them that he'll lead them to the purple Key-Tana.
When the Ninja and Okino spotted the Red Dragon with the purple Key-Tana, Jay attempted to grab it, but only for the Red Dragon to wake up and attack the ninja. However, when Okino told the Ninja about the Red Dragon's weak spot, the ninja were able to weaken it. Moments later, when the Red Dragon was about to attack Lloyd, Jay used the purple Key-Tana and defeat the Red Dragon with it.
Jay inserts all of the Key-Tanas near the fire wall in order to confront Unagami.
As shown in The Maze of the Red Dragon, the Key-Tanas can be used in combat and can release an energy wave against an opponent.
They can also float on their own with no one holding them.
- The Key-Tanas are a portmanteau of "key" and "Katana."
- In 71712 Empire Temple of Madness, When all three Key-Tanas are combined at the Temple of Madness, it seems to trigger a mechanism that reveals Unagami.
- In the sets, the Key-Tanas can be used to change vehicles.
- In the sets, they are plugged into loot boxes. However, in the show, they hang in the air without them.
The images on Key-Tanas need to be organized.