Thorn Erruption

You cause painfully sharp thorns to erupt from the inside of up to three creatures you can see within range. Those creatures must make a Constitution saving throw, taking 12d8 piercing damage on a failed save and they become paralyzed for 1 minute. A creature takes half as much damage and is not paralyzed on a successful save. While paralyzed, a creature takes 1d8 piercing damage at the end of it's turns. A creature can use it's action on its turn to make another Constitution saving throw, ending the paralyzing effect on itself with a success. Piercing damage caused by this spell ignores resistance to piercing damage.