PHB, page 237

Eldritch Blast with Agonizing Blast & Repelling Blast

0-level (Cantrip) Evocation

A beam of crackling energy streaks toward a creature within range. Make a ranged spell attack against the target. On a hit, the target takes 1d10 force damage.

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Agonzing Blast When you cast this cantrip, add your Charisma modifier to the damage it deals on a hit.

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Repelling Blast When you hit a creature with this cantrip you can push the creature up to 10 ft. away from you in a straight line.
 
At higher levels: The spell creates more than one beam when you reach higher levels: two beams at 5th level, three beams at 11th level, and four beams at 17th level. you can direct the beams at the same target or at different ones. Make a separate attack roll for each beam.