Diamond Caltrop

The user flings a gem that shatters mid-air, raining a carpet of shimmering caltrops that cover a 10-foot square. When a creature enters this area, they must succeed on a Dexterity saving throw versus your spell save DC, taking 2d4 per 5 feet travelled into the area on a failed save. A creature moving at half speed has advantage on their saving throw against this spell.

Additionally, any creature that starts their turn in the spell's area must succeed on an Intelligence saving throw (DC 10) or be temporarily stunned for 1 round by the shimmering caltrops surrounding them.