New Cantrip: Earth Fist

Conjuration cantrip
Casting Time: 1 action
Range: 80 feet
Components: V, S
Duration: Instantaneous
You target an area of sand, dirt, or rock within range that you can see. You conjure a mighty earthen fist to burst from the surface and punch, slap, poke, or slice a foe within 5 feet of the surface. You make a melee spell attack with advantage as if from the fist’s position. If you hit, you deal 1d10 bludgeoning damage to the target. Once the fist has finished attacking, hit or miss, the hand crumbles back into the ground, and the surface returns to its original state.
5th: 2d10
11th: 3d10
17th: 4d10

EDIT: Due to restriction of htting land based targets, increased damage to 1d10. Since the fist can attack a creature out of line of sight, its reduced range over firebolt shouldbe sufficient for balance.