Circle of Primordial Force

Druid of the Circle of Primordial Force embody the essence of primal earth.  Their congregations can be found across Wildspace and often find themselves at odds with the Circle of Stars.  Druids of Primordial Force often form cults on asteroids and other celestial bodies, where elder druids will spends days at a time communing with the timeless bodies of stone.  These druids are sturdier than most, the most powerful of them taking on the properties of stone itself.

Stone Form

Starting at 2nd level, as a bonus action, you can expend a use of your Wild Shape feature to take on an elemental form, rather than transforming into a beast.  When you assume this shape, you no longer need to breathe and become immune to necrotic and poison damage, and you gain resistance to non-magical slashing, non-magical piercing damage and have advantage on Constitution saves.  You have disadvantage on Dexterity saving throws, and vulnerability to thunder, force, and bludgeoning damage.  Additionally, choose one of the following.

Stone: Your body becomes solid stone.  All of the normal rules of Wild Shape apply, except for the following changes.  Your AC becomes 12 + your Wisdom modifier + your Constitution modifier.  Your Wisdom, Intelligence, Charisma, and Constitution ability scores are your own in this form, and your Strength ability score becomes your Constitution ability score, and your Dexterity ability score becomes 5.  If your Dexterity ability ever falls below 3 while in this form, you are petrified and cannot move until you end your Stone Form or your Dexterity ability is above 3 again. Your hit die in this form is a d12, and you add your proficiency bonus to each die for determining your hit points in this form.  You can not wield a weapon in this form, instead you make a Slam attack.  This attack deals 1d12 magical bludgeoning damage, plus your Strength modifier.

Crystal:  While in your crystal form, you retain your game statistics, but your body becomes becomes crystal, in the color and opacity of your choosing.  Your AC become 10 + your Wisdom modifier + your Constitution modifier.  When you make an Intelligence or a Wisdom check or a Constitution saving throw to maintain concentration on a spell, you can treat a roll of 9 or lower on the d20 as a 10.

Stony Toughness

At 6th level, your very skin begins to harden like stone.  Whenever you complete a long or short rest, you gain temporary hit points equal to twice your druid level.  Additionally, as a reaction you may harden your skin against attacks, adding the result of a d6 to either your AC or a Strength, Wisdom, or Constitution save.

Awaken Stone

Starting at 10th level, you can commune with the essence of stone.  Once per long rest, you may spend eight hours tracing magical pathways within a precious gemstone, and then touch a Huge or smaller body of stone. The target must have either no Intelligence score or an Intelligence of 3 or less. The target gains an Intelligence of 10. The target also gains the ability to speak one language you know. Your GM chooses statistics appropriate for the awakened stone, such as the statistics for an Earth Elemental or Stone Golem.

The awakened elemental is charmed by you for 30 days or until you or your companions do anything harmful to it. When the charmed condition ends, the awakened elemental chooses whether to remain friendly to you, based on how you treated it while it was charmed.

There is no limit on how many elementals can be awakened by you, but only a number of elementals equal to your Wisdom modifier may be charmed by you.  You may end the effects your charm on an elemental at any time, otherwise if you would have more than your Wisdom modifier in charmed elementals at any time, the oldest awakened elemental's charm effect ends.

Improved Stone Form

Starting at 14th level, your connection with the earth improves.  While in Stone Form, you can resistance to all slashing, piercing, fire, cold, lightning, and psychic damage.  You no longer have a vulnerability to non-magical bludgeoning damage.

In Stone Form: Stone, your AC is now 14 + your Wisdom modifier + your Constitution modifier.  Your Slam attack also adds your Wisdom modifier.

In Stone Form: Crystal, your AC is now 12 + your Wisdom modifier + your Constitution modifier.  You have advantage on saves against magical abilities, and apply your Constitution modifier to all other ability saves, and your Wisdom modifier to your Constitution saves.