Adaine's Furious Fist

For the duration of this spell your fist gleams with silvery, arcane light. As an action you may make a melee spell attack against a creature you can see within range of your unarmed attack. The first such successful attack during the duration of this spell deals 2d10 force damage to the target. Additionally, the target must succeed on a strength saving throw or be pushed 5 feet away from you and knocked prone.

 At Higher Levels. When you cast this spell at higher levels, it deals 1d10 extra Force damage per spell level above 1st. It also pushes the target back an extra 5 ft. per spell level above 1st.

Credit: Brennan Lee Mulligan - Dimension 20