Realm Crystal

The Realm Crystal is an ancient gem-like artifact used by the First Spinjitzu Master.

Pre-Season 5
At some point in Ninjago's ancient past, The First Spinjitzu Master created the Realm Crystal and left it in his Tomb. The First Spinjitzu master created the Realm Crystal so no one could have the power to cross between realms at will

Appearances

 * 70736 Attack of the Morro Dragon
 * 70738 Final Flight of Destiny's Bounty
 * LEGO Ninjago: Masters of Spinjitzu

Realms

 * Cursed Realm (formerly)
 * Chima
 * Dark Realm
 * Underworld
 * Cloud Kingdom
 * 10 Other Unknown Realms

Trivia

 * The Realm Crystal is the third and last remaining means of accessing the Cursed Realm, with the first having been Clouse's Spellbook and the second having been the Allied Armor of Azure (which could bring people out of the realm, but not bring people into it). Clouse's Spellbook was burnt by Lloyd at the end of The Corridor of Elders, while the Allied Armor was destroyed by Nya in The Temple on Haunted Hill.
 * Apparently, the Realm Crystal's sides are doors to sixteen other Realms.
 * One of the realms accessible by the Realm Crystal is the main setting of LEGO's Legends of Chima theme. Incidentally, the final episode of the Chima cartoon revealed that the land of Chima was only a small part of a much larger world.
 * It is unknown if the other realms accessible by the crystal include other LEGO settings (such as BIONICLE, for example)
 * The Realm Crystal was one of many artifacts created by the First Spinjitzu Master.
 * Other artifacts include the Golden Mech, the Elemental Blades, and the Golden Weapons.