Dark Harvest

Using the natural magic of the earth, you coax plants to sprout from within a target in range. The target must make a Constitution saving throw against your spell save DC or have plants burst painfully from within it's body. If the target fails the save, numerous plants of your choice take root and violently erupt from under the target's skin, dealing 3d10 slashing damage. If this spell would kill the target, and provided that you are within 30 feet of the target in such a case, you gain temporary hitpoints equivalent to half of any additional damage the target might take after dropping to 0 hitpoints. A successful save stops the spell, and the target takes no damage.