Disequilibrium

You twist a creature's sense of balance and it perceives the world shifting beneath its feet. Choose a creature on a flat surface within range. The target must succeed on an Intelligence saving throw, or else fall Prone, and slide 20 feet in a straight line in a direction of your choice. If the target would fall from a ledge or break in its surface as a result of this movement, the creature may make a Strength (Athletics) or Dexterity (Acrobatics) Ability Check to prevent itself from falling and end its movement.

At higher levels: When you cast this spell using a spell slot of 2nd level or higher, you can target one additional creature for each slot level used above 1st.