Cursed Realm

The Cursed Realm is a unknown location and dimension in LEGO Ninjago: Masters of Spinjitzu.

Spellbound
In Spellbound, After the end of the Serpentine Wars, Garmadon used the spell to banish Arcturus and a few other Anacondrai Generals into the Cursed Realm so they won't be seen or go back into Ninjago to cause any more threats again.

The Day of the Dragon
In The Day of the Dragon, Clouse used the spell to the Cursed Realm to try to get rid of Garmadon so he wouldn't see him again. But however, Garmadon managed to escape getting sucked in the dimension leaving Clouse to get banished by the spell he used.

The Corridor of Elders
In The Corridor of Elders, Lloyd had to use the spell which opened the Cursed Realm in order to banish the Anacondrai Tribe and also banish his father. At the end of the episode, Moro somehow went through the portal (which was possibly closed) into Ninjago.