Elementalists tend to fall into one of two main schools of thought, either using arcane magic to work with the element or using arcane magic to bend the element to the caster's will.  Neither schools of thoughts have an inherent moral or ethical biases, determining the moral and ethical values is something best left to the elementalists and philosophizers, right now we have a quest to finish.

Earth's Embrace

Earth's Embrace is a variation of the level 1 shield spell and acts in the same fashion with one notable exception which is it does not prevent magic missile from striking the target.  As a reaction, the caster can invoke Earth's Embrace giving all the benefits of a shield spell (minus the immunity to magic missile) at 2nd level.  The caster must be in contact with the ground for this ability to work.  Able to be cast a number of times per day equal to INT modifier, minimum 1, per long rest.

Earth's Ensile

See Meld Into Stone spell.

Stone Armor

This ability functions like the stoneskin spell but does not require concentration.  For 1 hour, the caster is encased in a semi-flexible suit of stone armor and has all the benefits of a stoneskin spell as well as the following as if in a full set of plate armor.  It does not impede casting.  Able to be cast a number of times per day equal to INT modifier, minimum 1, per long rest.

AC: 18

Stealth: Disadvantage

DEX Modifier allowed: 0

Weight: 65 lbs (would be heavier, but it is being supported by magic as well).

 

Investiture of Stone

As per spell of the same name.  Able to be cast a number of times per day equal to INT modifier, minimum 1, per long rest.