Briar Patch

The ground in a 20-foot radius centered on a point within range magically sprouts a massive entanglement of briars. The briars are razor sharp and pointed. The area becomes difficult terrain for the duration. When a creature moves into or within the area, it takes 4d6 piercing damage for every 5 feet it travels.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.

The transformation of the ground is camouflaged to look natural. Any creature that can't see the area at the time the spell is cast must make a Wisdom (Perception) check against your spell save DC to recognize the terrain as hazardous before entering it.