Eldritch Beam

A fairly large beam of shining blue crackling energy streaks toward a creature within range. Make a ranged spell attack against the target. On a hit, the target takes 3d10 force damage and the target in knocked back 10 ft. 

The spell become more powerful more when you reach higher level spell slots: two beams at 5th level, three beams at 11th level, and four beams at 17th level.