Doom blossom

A blast of pink flower petals erupts from your hands. Each creature in a 30-foot cone must make a Dexterity saving throw. A creature takes 8d6 slashing damage on a failed save, or half as much damage on a successful one.

A creature killed by this spell has its body overgrown by pink roses, and transfers life to the caster. You gain 3 temporary hit points per creature killed, increasing by 1 per creature killed per spell slot above 3rd.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.