Primal Form: Elemental

You transform into a Medium elemental of your choice (air, earth, fire, or water). You gain the elemental's movement modes, damage immunities and resistances, and special abilities, but retain your mental statistics and spellcasting ability. Your equipment merges with your new form.

At 6th level, you can choose to become a Large elemental with enhanced abilities. At 9th level, you can transform up to 2 willing allies along with yourself.

You retain the ability to cast spells, but verbal components may be altered by your new form. You can cast while transformed, but material components must be worn/merged or replaced by a focus you're carrying; DR applies normally to your natural attacks unless the elemental entry says otherwise. While transformed, you count as your original type and Elemental for effects that care about type. The DN provides specific statistics for the elemental form chosen.