Cloud valley biome

A floating overworld biome with dense mist and unstable mist blocks (CLOUDS!) and some mobs:

Unicorns that have jump boost, speed, or slow falling auras and act like horses

Skydoves that can deliver items to their assigned storage

Stormlings: foxlike storm creatures that become charged and go hostile during storms but revert back. They look and act like fennec foxes. They have electric attacks when charged.

Phantoms