|This article is about the area from the spin-off TV series. You may be looking for the area from the games.|
The Isle of the Citadel in the Skylanders Academy TV show is a remote location in Skylands that contains some of its greatest secrets, including the Core of Light, that are essential to the very existence of the universe.
The path to the Core of Light appears to warp the island's appearance as those who conquer its trials advance through doors, seemingly sending them to other identical locations or to the skies above.
It was built by Master Eon after the Great War where he lived in solitude to think about what to do next to protect Skylands. Eventually, Eon started Skylander Academy and left the citadel hidden under a shroud of magic, with machinery to move it when its location is discovered.
In Missing Links, fearing that Kaos had discovered the isle's location, Master Eon and King Pen planned the relocation of the Citadel, with the wizard moving it with machinery hidden in the Academy's basement.
Only the brave of heart and strong of mind can overcome the obstacles placed at the Citadel. No Skylander team had ever gone to the area until Spyro's team was sent to retrieve a cure for Eon's dark magic-driven sickness in Assault on Skylander Academy.
In It Techs Two, the isle was threatened when a dark force disrupted portal signals and caused their destinations to change. This made Master Eon realize that the malfunctioning portals may teleport evildoers to the Isle of the Citadel and allow them to destroy the Core of Light. When Jet-Vac and Sprocket are accidentally sent to the isle, they were ambushed by an Arkeyan Robot that suddenly teleported in. Through the Sky Baron's magic eggs, they reactivated the portal and sent the robot away before leaving the isle themselves.
In Raiders of the Lost Arkus, Part 2, the Isle of the Citadel was visited by Kaos and Glumshanks after they rode there on the Conquertron to destroy the Core of Light. After a long battle between them and the Skylanders, the Conquertron was destroyed when Eon sacrificed his physical existence to protect the Core of Light.
- Though it was said that only Eon and King Pen were aware of its location, Dale, the wizard that manages its trials, spends his time in Campus Town, apparently leaving and returning to the isle at will. He's also nowhere to be seen during its invasion by Kaos.
- The Isle shows signs of disuse and buildings are yellower, but has the same appearance as the Ruins after its reconstruction. Like the original in Skylanders: Giants, it is missing its main building and Weapon Master is no longer in the waterfall. When being moved by Eon's mechanisms, the Core of Light glows brightly and the skies around it clear, giving the city a more lively appearance temporarily.