Circle of the Mountain

Titanic Blows
When you choose this circle, at 2nd level, your body takes on the strength of the mountains. You can roll a d4 in place of the normal damage of your unarmed strikes.
Also, when you use the Attack action with an unarmed strike on your turn, you can make one unarmed strike as a bonus action.
Mountain Shape
At 2nd level, when you use your Wild Shape feature, you can cover yourself in hard stone, instead of transforming. For the duration, you gain the following benefits:
- You have resistance to bludgeoning, piercing, and slashing damage.
- Your AC is equal to 13 + your Constitution modifier.
- Your unarmed strikes become magical, and deal 1d6 bludgeoning damage. At 10th level, this increases to 1d8.
- You have advantage on all saving throws against being forcibly moved or knocked prone.
These benefits last for 10 minutes or until you use your Wild Shape again.
Extra Attack
Beginning at 6th level, you can attack twice, instead of once, whenever you take the Attack action on your turn.
Tremor Strike
At 10th level, you can send tremors through the earth, using your fist. As an action, you pound the earth, and force a Strength saving throw from all creatures within 15 feet of yourself. A creature takes bludgeoning damage equal to 2d8 + your Strength modifier and is knocked prone on a failed saving throw, or half the damage without being knocked prone on a success.
Might of the Mountaintop
By 14th level, you have learned a special technique that channels the might of mountains through your fists. When you hit a creature with an unarmed strike on your turn, you can expend a spell slot of 1st level or higher to deal 1d8 bludgeoning damage to the creature for each slot level expended, to a maximum of 5d8. The creature must then succeed on a Strength saving throw, or be moved away from you in a straight line a number of feet equal to 5 + 5 x the slot level expended. If you expend a 3rd level slot or higher, then the creature is also knocked prone on a failed save.