Air Elemental and Storm Elemental
Dwelling
Air Elementals can be recruited from an Elemental Conflux or an Air Elemental Conflux. In Armageddon's Blade, they can be recruited from the Altar of Air on a map or as part of the Conflux town.
Upgrading
Can be upgraded to Storm Elemental for 25 gold per Air Elemental (Armageddon's Blade only).