Arcane Burst

You create a bolt of energy and launch it at one creature within range. Make a ranged spell attack against the target. On a hit the target takes 2d10 force damage. Hit or miss the bolt then shatters. The target and each creature within a 10 foot cone facing away from you and centered on the target must make a dexterity saving throw or take 1d10 force damage.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher the cone effect's damage increases by 1d10 for each slot level above 1st.