The Floating Cities

Nomadic groups of elemental people that live on massive magic rafts that float around the ocean. Rigid castes based on the element you're born as.

Keywords	Elements, Sea, Nomad
Themes	Freedom vs Structure
Terrain	Oceans, rafts, ships
Portals	N/A (Unless they run into one at a small island)
Common Elements	Air, Earth, Fire	Rare Elements	Bolt, Ice, Dark

Void elemental: Mystical fifth kind of elemental the is claimed to run each city