Beam of Piercing Magic

A extended beam of glowing magical force forming a 30-foot-long, 5-foot-wide Line blasts out from you in a direction you choose. Each creature in the Line makes a Dexterity saving throw, taking 5d4 force damage on a failed save or half as much damage on a successful one, if the Dexterity saving throw is failed by 5 or more roll a additional 2d4.

OR

A immense beam of glowing magical force forming a 15-foot-long, 15-foot-wide Line blasts out from you in a direction you choose. Each creature in the Line makes a Dexterity saving throw, taking 5d4 force damage on a failed save or half as much damage on a successful one, if the Dexterity saving throw is failed by 5 or more roll a additional 2d4.

Using a Higher-Level Spell Slot. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 2d4 for each slot level above 2nd.