Protect the Natural Order. Rocks, metals, and gemstones, all minerals are sturdy because of their strong crystalline structure – and in the same way, your Circle is concerned with the protection of Order.
A tanky gish druid. This subclass is to the Druid what the College of Swords is to the Bard or the Bladesinger is to the Wizard. However, where those two gish subclasses focus on dexterity and nimbleness, the Circle of Crystals is more about being a tank.
Want to check it out? Here it is: https://www.dmsguild.com/product/374702/Druid–Circle-of-Crystals
Trekiros 