Elemental Mage

You transform yourself into either an Earth Elemental, a Fire Elemental, an Air Elemental, or a Water Elemental until you lose concentration or you are reduced to 0hp. While you are transformed, the following rules apply:

• Your game statistics are replaced by the statistics of the elemental, but you retain your alignment, personality, memory, and Intelligence, Wisdom, and Charisma scores. You retain all of your skill and saving throw proficiencies for mental checks, but will take on the physical proficiencies of elemental. 
• You can still cast cantrip spells, but no spells that are leveled.  You retain the languages you know, and while in the form of the elemental you are able to communicate with other elementals of the same type.
• You have the AC and HP of your chosen elemental, and will revert back to your form should you drop to 0hp.  Any excess damage will be carried over to your normal form.
• Items you are wearing or carrying will be merged into your new form and can no longer be accessed or used and you lose any benefit provided by them (attunement, if you are attuned to magic items, is not broken) until you revert back to your normal form.
• You can end the spell early, reverting back to normal form, with a bonus action.