About the islands

The frozen dimension is said to be the hardest island to come across in all of blox fruits and it is used to spawn the leviathan which can be used for a lot of different things like mythical scrolls and the leviathan shield.  

The prehistoric island can only be found if you have a volcanic magnet and is recommended to do it with at least 2 people to do this island but their can be more people as well.

Mirage island is a really important island to get race v4 because you can get the blue gear but it has to be full moon.

kitsune island can only spawn when full moon happens an unlike prehistoric and frozen it can be spawned by 1 person.