A 16-sided crystalline object that allows the user access to any of the realms connected to the NINJAGO world. Each of the 16 facets of the crystal provides entry to a different realm. The Realm Crystal was created by the First Spinjitzu Master and no one knows if more than one is in existence. The First Spinjitzu Master knew the crystal was incredibly powerful and could cause terrible danger if it fell into the wrong hands, so he had it sealed within his tomb. The Realm Crystal is blue in color.

Ninja Dojo
Elemental Blade
4.5 Bricks
Inventing Gadgets