A while back, I posted the Stone Domain. I was never really satisfied with having thunderwave on the list, so I decided at taking a crack on making a new spell. I could see this being added to the druid spell list or for Four Elements monks.

STONEFIST

1st-level transmutation
Casting time: 1 action
Range: Self
Duration: Concentration, up to 1 minute

Your clenched fist becomes encased in stone. You can use your action to make a melee spell attack with the fist. On a hit, the target takes 1d8 bludgeoning damage and must succeed a Strength saving throw or be pushed back 5 feet. If the target can’t move back, it is knocked prone on a failed saving throw instead. The fingers of the effected hand are completely immovable until the spell ends.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d8 for every four slot levels above 1st.