The Cornerstone of Light (光のいしずえ Hikari no Ishizue) is a sacred relic of Disney Castle that appears in Kingdom Hearts II. A large sphere made of crystal or glass that sits atop an ornate pedestal and contains swirling light, the Cornerstone protects Disney Castle from Darkness. It can be found in the Hall of the Cornerstone, a hidden room under Mickey Mouse's throne, which is accessed by pressing a hidden switch under the arm of the throne.

Although it is a powerful artifact and heavily protected, Maleficent takes advantage of a door that appears into Disney Castle-exile Pete's past after he is made miserable by her constant abuse. Using the door, Pete is sent back in time to when the castle had yet to be built, and the Cornerstone sat unprotected on a hill. There, he attempts to steal the Cornerstone, weakening the defenses of the present Disney Castle and allowing Darkness to penetrate the castle; the Heartless then invade and attempt to take the castle and its inhabitants prisoner. Maleficent's trademark thorns surround the Cornerstone and she appears in a vision to taunt Queen Minnie about her imminent victory.

Sora, Donald, and Goofy receive a distress call and arrive just in time to help Queen Minnie raise a defense against the invaders. After a quick trip to Hollow Bastion to seek Merlin's help, they discover the time loophole that has allowed Pete and Maleficent to weaken the Cornerstone's protection. By taking a trip through a new door that appears in the Hall of the Cornerstone that leads to Timeless River, Sora and his party manage to thwart Pete and Maleficent's plans and restore the Cornerstone of the present to full power. The Cornerstone also opens gates to Port Royal and Atlantica.

It seems that the Cornerstone's protection has weakened by the events of Kingdom Hearts 3D: Dream Drop Distance, as Maleficent is able to invade the castle and take Minnie hostage.

Kingdom Hearts series

Games: Kingdom Hearts + Final Mix | Chain of Memories | Re:Chain of Memories | Kingdom Hearts II + Final Mix | 358/2 Days | Birth by Sleep + Final Mix | coded | Re:coded | Dream Drop Distance | HD 1.5 ReMIX | Χ (chi) Incorporated Films and shorts: Alice in Wonderland | Aladdin/ The Return of Jafar | Beauty and the Beast | Cinderella | Fantasia | Hercules | The Hunchback of Notre Dame | Lilo & Stitch | The Lion King | The Little Mermaid | Mickey, Donald and Goofy: The Three Musketeers | Mulan | The Nightmare Before Christmas | Peter Pan | Pinocchio | Pirates of the Caribbean: The Curse of the Black Pearl | Sleeping Beauty | Steamboat Willie | Snow White and the Seven Dwarfs | Tarzan | Tron/ Tron: Legacy | The Many Adventures of Winnie the Pooh Original Characters: Sora | Riku | Kairi | Terra | Lingering Will | Ventus | Aqua | Master Eraqus | Vanitas | Master Xehanort | Ansem | Xemnas | Xigbar | Xaldin | Vexen | Lexaeus | Zexion | Saïx | Axel | Demyx | Luxord | Marluxia | Larxene | Roxas | Xion | Naminé | Ansem the Wise | DiZ | Terra-Xehanort | Braig | Dilan | Even | Aeleus | Ienzo | Isa | Lea | Data Sora | Data Riku | Data Naminé | Data Roxas | Hayner | Pence | Olette | Riku-Ansem | Kairi's Grandma | Riku Replica | Anti-Saïx | Anti-Sora | Anti-Riku | Sora-Heartless | Jiminy's Journal | Young Xehanort | Xehanort's Guardian Original Monsters: Hostile Program | The Experiment | Heartless | Nobodies | Unversed | Dream Eater (Nightmares) | Dream Eater (Spirits) Disney Characters and Villains: King Mickey | Donald Duck | Goofy | Queen Minnie | Daisy Duck | Pluto | Tarzan | Winnie the Pooh | Aladdin | Genie | Tron | Magic Brooms | Peter Pan | Quasimodo | Yen Sid | Maleficent/Dragon Maleficent | Judge Claude Frollo | Jiminy Cricket | Merlin | Tigger | Eeyore | Rabbit | Ariel | Mulan | Mushu | Jack Sparrow | Chernabog | Simba | Timon | Pumbaa | Nala | King Triton | Jafar/Genie Jafar | Alice | Cheshire Cat | Jack Skellington | Esmerelda | Phoebus | Beagle Boys | Scrooge McDuck | Huey, Dewey and Louie | Master Control Program | Sark | CLU | Rinzler | Beast | Stitch | Hercules | Tick-Tock the Crocodile | Beagle Boys (More coming soon) Square Enix Characters: Tidus | Wakka | Selphie | Leon | Yuffie | Cloud | Sephiroth | Moogle | Vivi | Setzer | Auron | Tifa | Yuna | Rikku | Paine | Org Moogle | Zack | Neku Sakuraba | Joshua | Beat | Shiki | Rhyme Plot Elements: Kingdom Hearts | Heart | Memory | Light | Darkness | Keyblade War | Mark of Mastery exam | Gate | Keyhole | Recusant's Sigil | Universe of Kingdom Hearts | Dark Seeker Saga Game Elements: Drive Form | Dark Mode | Limit | Summon | Dimension Link | Battle of the 1000 Heartless | Ansem's Reports | Secret Reports | Xehanort's Report | Roxas's Diary | Trinity | Save Point | Hit Points | Magic | Reaction Command | Command Style | Shotlock | Trinity Archives | Sticker Album | Deck Command | Level | Link System | Item synthesis | Lock-On | Gauges | Flowmotion | Moogle Shop | Finish command (KHBBS) | Mission Mode | Difficulty Level | Recipe | Magic Abilities/Abilities | Avatar Menu | Trophies Objects: Paopu Fruit | Sea-salt ice cream | Ice Cream | Munny | Wayfinder | Door to Darkness | Memory Pod | Cornerstone of Light | Keyblade | X-blade | Mickey's Letters | Kairi's Letter | Thalassa Shell | Kingdom Hearts Encoder | Keychain | Gummi Blocks | Bug Blox | Black coat | Keyblade Armor | Crown Locations: Land of Departure | Disney Castle | Disney Town | Timeless River | Datascape | Radiant Garden | Keyblade Graveyard | Mirage Arena | Destiny Islands | Traverse Town | Hollow Bastion | Dive to the Heart | End of the World | Realm of Darkness | Castle Oblivion | Twilight Town | Old Mansion | The World That Never Was | Castle That Never Was | Cavern of Remembrance | Simulated Twilight Town | Chambers of Repose and Waking Organizations/Groups: Organization XIII | True Organization XIII | Hollow Bastion Restoration Committee | Princesses of Heart | Disney Villains Council Vehicles: Gummi Ship | Keyblade Glider Mini Games: Gummi Missions | Arena Mode | Command Board | Ice Cream Beat | Rumble Racing | Fruitball | Flick Rush | Dive Mode | Puzzle Music: Dearly Beloved | Simple and Clean | Sanctuary | Swim This Way | Part of Your World | Under the Sea | Ursula's Revenge | A New Day is Dawning | Destati Soundtracks: Kingdom Hearts Original Soundtrack | Kingdom Hearts Final Mix - Additional Tracks | Kingdom Hearts II Original Soundtrack | Kingdom Hearts Original Soundtrack Complete | Kingdom Hearts Birth by Sleep & 358/2 Days Original Soundtrack | Kingdom Hearts: Dream Drop Distance Original Soundtrack | Kingdom Hearts 10th Anniversary Fan Selection -Melodies & Memories- | Piano Collections Kingdom Hearts | Piano Collections Kingdom Hearts Field & Battle Secret Endings: Another side, Another story... | The Gathering | Birth by sleep (video) | Blank Points | A fragmentary passage | Signs of What's Next | Another Guardian of Light

 

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