Soul of the Mountain

You become a living embodiment of the mountain’s eternal power—immovable, crushing, and unbreakable. For the duration:

• Your type changes to Elemental. As such, you gain the following benefits:
• You gain immunity to Poison damage, you cannot be put to sleep by supernatural means, and you are immune to Paralyzed, Poisoned, and Stunned.
• You are immune to Critical Hits, Sneak Attack, and you cannot be Flanked.
• Unlike most Elementals, your soul does not form a singular unit with your body. As such, if you die in this state, use the normal rules of death for your original creature type.
• You gain a +5 bonus to AC.
• You gain immunity to bludgeoning damage and resistance to piercing and slashing damage.
• You cannot be knocked Prone or moved against your will.
• The ground within 60 feet of you becomes difficult terrain for creatures of your choice. Spells that manipulate terrain (such as Entangle or Wall of Stone) within this area instead reinforce your position if they are not cast by you, causing the spell to fizzle and granting you temporary hit points equal to twice the spell level plus your Druid level.

  Once per turn, as an action, you may cause a shockwave to erupt from your position. All creatures of your choice within range on the ground must make a Strength saving throw, taking 6d10 Bludgeoning damage and being knocked Prone on a failure.   As a bonus action, you can choose up to six creatures within range that are on the ground. Each of those creatures gains the benefits of Stoneskin until the end of your next turn. Once you do so, you cannot use this portion of the spell again until you cast it again.