As an action, your free hand transform into sand, forming a sledgehammer. Make a melee spell attack against the target.
On a hit, it takes 1d8 bludgeoning damage.
On a critical hit, it takes twice as much damage.
On a miss by 4 or less, it takes half as much damage.
After you make the attack, hit or miss, the sand falls at the target’s feet, burying them in sand and your hand returns to normal. Its speed is reduced by 1 meter until the end of its next turn.
At higher levels
This spell’s damage increases by 1d8 when you reach 9th level (2d8) and 17th level (3d8).