Also called the Island of Darkness, it was once part of the island of Ninjago.
A long time ago, the First Spinjitzu Master battled the overlord and his Stone Army. To keep the Overlord from turning Ninjago evil, he banished the Overlord to the other half of the island and split it in two.
Now the island is a place of evil and darkness, where only few may travel.
A few notable locations on the island include the Temple of Light, the River of Darkness, the Jankikai Jungle, Shadow Bay, No Man's Bluff, Digger's Deep, and the Celestial Clock.