Briars of Sin

You draw blood with your spellcasting focus, allowing it to fall to the ground and creating a whorl of bloody thorns around you. All other creatures within 5 feet of you must succeed on a Dexterity saving throw, taking 3d6 magical piercing damage on a failed save or half as much on a successful one.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d6 for each slot level above 2nd. When you cast this spell using a spell slot of 5th level or higher, an additional spiral of thorns is created, increasing the range of the spell by 5 feet. When you cast this spell using a spell slot of 7th level or higher a third additional spiral of thorns is created, increasing the range of the spell by another 5 feet, totaling 15 feet.