You create a swirling sphere of force energy in your palm. Make a melee spell attack against the target. On hit, the target takes 2d12+2 force damage and must make a constitution saving throw. On a successful save the target takes half of the roled damage and isnt knocked back. On a failed save the target takes the full damage, is flung back 15 feet and is knocked prone. 

This spell's damage increases by 1d12+2 for every spell slot used beyond 1st level.