Kulu Gem Attack

When you take the Attack action on your turn, you can replace one of your attacks to form a boulder in your hand from dust and debris on the ground, then hurl it at a creature within 60 feet of you.

That creature must make a DC 14 Dexterity saving throw, taking 2d10 bludgeoning damage on a failed save, or half as much damage on a successful one.

You can use this property a number of times equal to your proficiency bonus, regaining all expended uses when you finish a long rest.