Earthen fling

When an creature attacks you within range, you can use a reaction to cast this spell. When cast, the earth bellow the enemy flings upward with a force to knock the opponent backwards. The creature must make a strength saving throw. On a failed throw the creature is thrown back by twice there movement speed or just their movement speed if they succeed. If the fling results in the creature going threw a surface it dose 1d6 bludgeoning damage per object launched threw. 

At higher levels: 

For every 3 spell slots above 3rd the launch multiply goes up by one. 6th level is 3 times movement speed and 9th is 4 times.