Carian Greatsword

You extend your arcane focus/material component into a large, magical, sweeping greatsword. Each creature in a 15 ft cone must make a Dexterity saving throw. On a failed save, the creature takes 3d6 + spellcasting mod force damage, and be knocked prone. On a succesful save, the creature takes half as much damage, and is not knocked prone

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.